1. A method for encoding a number of feedback information messages in a mobile radio communications system using carrier aggregation, the method comprising:
encoding said a number of feedback information messages by a set of codewords, where each feedback information message can be of at least a first kind or a second kind, and each codeword comprises a channel selected from a number of A channels and a modulation symbol selected from a number of S modulation symbols,
wherein for a feedback information message there is at least a first codeword corresponding to information of the first kind and at least a second codeword corresponding to information of the second kind, for said feedback information message a modulation symbol of said first codeword and a modulation symbol of said second codeword have a maximum distance, and wherein the codewords comprise a same channel and a different modulation symbol, and wherein for said feedback information message at least one of the S modulation symbols is unused for any codeword comprising said same channel.
2. The method according to claim 1, wherein the maximum distance is a Euclidean distance in a signal space.
3. The method according to claim 1, wherein, for the feedback information message, there is only one codeword corresponding to information of the first kind and only one codeword corresponding to information of the second kind.
4. The method according to claim 1, wherein, for the feedback information message, there is one codeword corresponding to information of the first kind and two codewords corresponding to information of the second kind.
5. The method according to claim 1, wherein the first kind of information is at least one of:
Negative-Acknowledgement, NACK,
Negative-Acknowledgement, NACKDiscontinuous Transmission, DTX, Discontinuous Transmission, DTX; and
the second kind of information comprises Acknowledgement, ACK.
6. The method according to claim 1, wherein the feedback information message relates to Multiple Input-Multiple Output, MIMO, feedback.
7. The method according to claim 1, wherein the feedback information message relates to Hybrid automatic repeat request, HARQ.
8. The method according to claim 1, wherein each of the A channels corresponds to a sequence.
9. The method according to claim 1, wherein there is a same channel distribution for at least two of said feedback information messages.
10. The method according to claim 1, wherein properties of the feedback information message apply for all feedback information messages.
11. The method according to claim 10, wherein in regard of a feedback information message there is a pattern, the pattern comprising:
a first number of codewords comprising a same channel and related to a first kind of information, and a second number of codewords comprising said same channel and related to the second kind of information,
and wherein said pattern holds true for all feedback information messages.
12. The method according to claim 1, wherein the number of feedback information messages is 2 or 3.
13. The method according to claim 1, wherein the number of modulation symbols S is 4.
14. The method according to claim 13, wherein the modulation is Gray coded Quadrature Phase Shift Keying, QPSK.
15. The method according to claim 1, wherein the mobile radio communications system is Long Term Evolution Advanced.
16. The method according to claim 1, wherein the number of said feedback information messages are configured by higher layer signalling.
17. A mobile terminal for a mobile radio communications system using carrier aggregation, the mobile terminal comprising:
a transmitter configured to send a number of feedback information messages, and a processor configured to encode said a number of feedback information messages by a set of codewords, where each feedback information message can be of at least a first kind or a second kind, and each codeword comprises a channel selected from a number of A channels and a modulation symbol selected from a number of S modulation symbols, wherein for a feedback information message there is at least a first codeword corresponding to information of the first kind and at least a second codeword corresponding to information of the second kind, for said feedback information message a modulation symbol of said first codeword and a modulation symbol of said second codeword have a maximum distance, and wherein the codewords comprise the same channel and a different modulation symbol, and wherein for said feedback information message at least one of the S modulation symbols is unused for any codeword comprising said same channel.
18. The mobile terminal according to claim 17, wherein the maximum distance is a Euclidean distance in a signal space.
19. The mobile terminal according to claim 17, wherein, for the feedback information message, there is only one codeword corresponding to information of the first kind and only one codeword corresponding to information of the second kind.
20. The mobile terminal according to claim 17, wherein, for the feedback information message, there is one codeword corresponding to information of the first kind and two codewords corresponding to information of the second kind.
21. The mobile terminal according to claim 17, wherein the first kind of information is at least combination or one of
Negative-Acknowledgement, NACK,
Negative-Acknowledgement, NACKDiscontinuous Transmission, DTX, Discontinuous Transmission, DTX; and
the second kind of information comprises Acknowledgement, ACK.
22. An apparatus comprising a processor coupled to a memory, the processor configured to execute computer-executable instructions stored in the memory to encode a number of feedback information messages in a mobile radio communications system using carrier aggregation, wherein the instructions comprise instructions for:
encoding said a number of feedback information messages by a set of codewords, where each feedback information message can be of at least a first kind or a second kind and each codeword comprises a channel selected from a number of A channels and a modulation symbol selected from a number of S modulation symbols,
wherein for a feedback information message there is at least a first codeword corresponding to information of the first kind and at least a second codeword corresponding to information of the second kind, for said feedback information message a modulation symbol of said first codeword and a modulation symbol of said second codeword have a maximum distance, and wherein the codewords comprise the same channel and a different modulation symbol, and wherein for said feedback information message at least one of the S modulation symbols is unused for any codeword comprising said same channel.
23. A radio base station for a mobile radio communications system using carrier aggregation, the base station comprises a receiver configured to receive a number of feedback information messages encoded by a set of codewords, where each feedback information message can be of at least a first kind or a second kind and each codeword comprises a channel selected from a number of A channels and a modulation symbol selected from a number of S modulation symbols,
wherein for a feedback information message there is at least a first codeword corresponding to information of the first kind and at least a second codeword corresponding to information of the second kind, for said feedback information message a modulation symbol of said first codeword and a modulation symbol of said second codeword have a maximum distance, and wherein the codewords comprise the same channel and a different modulation symbol, and wherein for said feedback information message at least one of the S modulation symbols is unused for any codeword comprising said same channel.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method for recognizing mobile signals in a wireless code division multiple access system, comprising:
measuring a moving speed of a transmitting end;
measuring a signal-to-noise ratio of a signal from the transmitting end; and
controlling a signal searching process of a receiving end coupled to a base station modem to recognize a signal from the transmitting end, said controlling including:
generating a first control signal for setting a first slot number of a non-coherent accumulator to compensate for the moving speed of the transmitting end;
comparing the signal-to-noise ratio to a predetermined level,
generating a second control signal by adjusting the first control signal; and
inputting the second control signal into the non-coherent accumulator, the second control signal changing the first slot number to a second slot number of the non-coherent accumulator to adjust the measured signal-to-noise ratio based on a result of the comparison.
2. The method of claim 1, wherein the transmitting end is user equipment.
3. The method of claim 1, wherein a Doppler estimator measures the moving speed.
4. The method of claim 3, wherein the first control signal generated by the Doppler Estimator is indicative of a weight and wherein the second control signal adjusts the weight based on a result of the comparison of the signal-to-noise ratio to the predetermined level.
5. The method of claim 4, wherein the second control signal adjusts the weight to achieve a desired mean acquisition time of the signal transmitted by the transmitting device.
6. The method of claim 1, wherein a signal to interference ratio estimator measures the signal-to-noise ratio.
7. The method of claim 1, further comprising: setting a weight for the non-coherent accumulator based on the second control signal.
8. The method of claim 1, further comprising: restricting a weight for the non-coherent accumulator based on the second control signal when the signal-to-noise ratio is lower than the predetermined level.
9. The method of claim 1, wherein the second control signal increases the first slot number to the second slot number to achieve a desired mean acquisition time for recognizing the signal transmitted from the transmitting end.
10. The method of claim 1, wherein the second control signal increases the first slot number to the second slot number when the signal-to-noise ratio is lower than the predetermined level.
11. The method of claim 1, wherein the second control signal increases the first slot number to the second slot number to offset a reduction in the signal-to-noise ratio resulting from the first slot number.
12. The method of claim 1, wherein the second control signal increases the first slot number to the second slot number to maintain the signal-to-noise ratio at a substantially constant level.
13. The method of claim 1, wherein the second slot number is set by the second control signal to offset a change produced by the first slot number set by the first control signal.
14. The method of claim 1, wherein the second control signal increases the signal-to-noise ratio above the predetermined level.
15. A method for recognizing signals in a CDMA mobile communication system, comprising:
despreading a received channel signal and accumulating different components of the despread signal according to coherent multi-slot accumulation, respectively;
squaring each component of the accumulated signals, and adding up the components to an energy value;
accumulating the energy value according to non-coherent multi-slot accumulation;
determining a moving speed of a transmitting end from which said received channel signal is derived;
determining a signal-to-noise ratio of the signal from the transmitting end; and
controlling a signal searching process of a receiving end coupled to a base station modem to recognize the signal from the transmitting end, said controlling including:
generating a first control signal for setting a first slot number for said non-coherent multi-slot accumulation to compensate for the moving speed of the transmitting end;
generating a second control signal by adjusting the first control signal; and
performing said non-coherent multi-slot accumulation based on the second control signal, the second control signal changing the first slot number to a second slot number to adjust the measured signal-to-noise ratio.
16. The method of claim 15, wherein the transmitting end is a user equipment, and the receiving end is a multi-path searcher of the base station modem.
17. The method of claim 15, wherein the components of the received channel signal are an in-phase (I) channel signal and a quadrature-phase (Q) channel signal.
18. The method of claim 15, wherein a Doppler estimator decides the moving speed of the transmitting end.
19. The method of claim 15, wherein determining the moving speed includes determining whether the moving speed of the transmitting end is a first speed or a second speed, wherein the first speed is greater than the second speed.
20. The method of claim 15, wherein a signal to interference ratio estimator determines the signal-to-noise ratio.
21. The method of claim 15, wherein, when the moving speed is determined to be higher than a first reference level and the signal-to-noise ratio is higher than a second reference level, the second control signal increases the first slot number to the second slot number.
22. The method of claim 15, wherein, when the signal-to-noise ratio is determined to be below a predetermined value, the second control signal increases the first slot number to the second slot number.
23. The method of claim 15, wherein the second control signal maintains the second slot number to offset a change produced by the first slot number when the moving speed of the transmitting end is above a first reference level and the signal-to-noise ratio is below a second reference level.
24. An apparatus for recognizing mobile signals in a CDMA mobile communication system, comprising:
a despreader which despreads a received signal into signal components;
a scrambling code generator which generates a scrambling code for use by the despreader;
a Doppler estimator which determines a speed of a mobile terminal which transmitted the received signal, and which generates first control information indicative of a first accumulation slot number based on the speed;
a signal-to-interference ratio estimator which determines a signal-to-noise ratio of the signal received from the mobile terminal, and which generates a second control information by adjusting the first control information, the second control information changing the first accumulation slot number to a second accumulation slot number to adjust the measured signal-to-noise ratio;
a coherent accumulator which receives the despread signal components, and accumulates the signal components in slot units;
a squaring circuit which squares each of the signal components accumulated in the coherent accumulator;
an adder which adds size elements extracted by the squaring circuit;
a non-coherent accumulator which accumulates a signal size added by the adder and controls an accumulation slot number based on the second control information from the signal-to-interference ratio estimator; and
a memory which stores output signals from the non-coherent accumulator.
25. The apparatus of claim 24, wherein the despreader despreads the received signal into an in-phase (I) channel signal component and a quadrature-phase (Q) channel signal component.
26. The apparatus of claim 24, wherein the Doppler estimator determines the speed of the mobile terminal by determining whether the speed is a first speed or a second speed, wherein the first speed is greater than the second speed.
27. The apparatus of claim 24, wherein, when the determined moving speed of the mobile terminal is determined to be higher than a reference level, the Doppler estimator transmits the first control information to the signal-to-interference ratio estimator to generate the second control information for increasing the first accumulation slot number for the non-coherent accumulator.
28. The apparatus of claim 24, wherein, when the signal-to-noise ratio is determined to be below a predetermined value, the signal-to-interference ratio estimator increases the first accumulation slot number to the second accumulation slot number for input into the non-coherent accumulator to a fixed slot number.
29. The apparatus of claim 24, wherein the coherent accumulator comprises:
a first coherent accumulator which receives an in-phase (I) channel signal component of the received signal; and
a second coherent accumulator which receives a quadrature-phase (Q) channel signal component of the received signal.
30. The apparatus of claim 24, wherein the squaring circuit comprises:
a first squaring circuit which receives a signal from the first coherent accumulator; and
a second squaring circuit which receives a signal from the second coherent accumulator.
31. The apparatus of claim 24, wherein the squaring circuit squares each of the signals and outputs energy values.
32. The apparatus of claim 24, wherein the adder adds energy values and outputs an energy value which is a signal size in a corresponding phase.
33. The apparatus of claim 24, wherein the coherent accumulator receives the despread signal components, accumulates the signal components within a slot range by a corresponding pilot symbol value, and re-accumulates the signal components in slot units set by a corresponding control signal from the Doppler estimator.