1. A wireless transmitting method of performing transmission by an orthogonal frequency division multiplexing (OFDM) using a plurality of subcarriers orthogonal to each other, the method comprising:
transmitting, by using a plurality of transmit antennas, a plurality of preambles formed of a plurality of different subcarrier groups selected from a plurality of subcarriers; and
transmitting a data by using the plurality of transmit antennas after the preambles are transmitted.
2. A method according to claim 1, wherein subcarriers selected at least one by one from the plurality of subcarriers in order of arrangement for each of the subcarrier group are sequentially allocated to each of the subcarrier groups of the plurality of preambles.
3. A method according to claim 1, wherein subcarriers selected from the plurality of subcarriers for each of a plurality of partial bands obtained by dividing a signal band in which the OFDM system is used are allocated to each subcarrier group of the plurality of preambles.
4. A method according to claim 1, wherein transmitting the plurality of preambles comprises, if a fading status of a propagation path to a wireless receiving device is short-delay fading, sequentially allocating, to each of the subcarrier groups of the plurality of preambles, subcarriers selected one by one from the plurality of subcarriers in order of arrangement, and, if a fading status of a propagation path is long-delay fading, allocating, to each of the subcarrier group of the plurality of preambles, subcarriers selected from the plurality of subcarriers for each of a plurality of partial bands obtained by dividing a signal band in which the OFDM system is used.
5. A method according to claim 1, wherein the preamble contains a short preamble, a long preamble, and at least one signal field.
6. A method according to claim 5, wherein the signal field contains a first signal field based on IEEE 802.11a.
7. A method according to claim 5, wherein the signal field contains a first signal field based on IEEE 802.11a, and a second signal field placed after the first signal field and based on a standard other than IEEE 802.11a.
8. A wireless receiving method for an orthogonal frequency division multiplexing (OFDM) using a plurality of subcarriers orthogonal to each other, the method comprising:
receiving, via a plurality of receiving antennas, a plurality of preambles containing a plurality of short preamble sequences formed of a plurality of different subcarrier groups selected from a plurality of subcarriers, and data following the preambles;
amplifying the received preambles by a variable gain amplifier having a gain; and
controlling the gain in response to reception of the short preamble sequences.
9. A wireless transmitting device which performs transmission by an orthogonal frequency division multiplexing (OFDM) using a plurality of subcarriers orthogonal to each other, comprising:
a plurality of transmit antennas;
a signal generator configured to generate a signal for a wireless packet to be transmitted by using the plurality of transmit antennas, the wireless packet including a plurality of preambles formed of a plurality of different subcarrier groups selected from the plurality of subcarriers; and
a transmitter configure to transmit data via the plurality of transmit antennas after the preambles are transmitted.
10. A wireless receiving device comprising:
a plurality of receiving antennas;
a receiver which uses an orthogonal frequency division multiplexing (OFDM) using a plurality of subcarriers orthogonal to each other, and receives, via the plurality of receiving antennas, a plurality of preambles containing a plurality of short preamble sequences formed of a plurality of different subcarrier groups selected from the plurality of subcarriers, and data following the preambles;
a variable gain amplifier which amplifies an output signal from the receiver; and
a gain controller which controls a gain of the variable gain amplifier in response to reception of the short preamble sequences by the receiver.
11. An apparatus according to claim 10, further comprising an analog to digital converter which converts the output signal from the variable gain amplifier into a digital signal.
12. An apparatus according to claim 10, further comprising an analog to digital converter which converts the output signal from the variable gain amplifier into a digital signal, an estimator which estimates channel impulse response by using a long preamble sequence contained in the digital signal output from the analog to digital converter, and a demodulator which demodulates the output digital signal from the analog to digital converter in accordance with the estimated channel impulse response.
13. A wireless transmitting method with a plurality of antennas, comprising:
transmitting a plurality of preamble signals with the plurality of antennas, the preamble signals being formed of a plurality of different subcarrier groups selected from a plurality of subcarriers orthogonal to each other, using an orthogonal frequency division multiplexing (OFDM) system; and
transmitting a data signal with the plurality of antennas, after transmitting the preamble signals.
14. A wireless receiver apparatus comprising:
a plurality of antennas;
a receiver, associated with the plurality of antennas, which receives a plurality of preamble signals containing a plurality of short preamble strings formed of a plurality of different subcarrier groups selected from the plurality of subcarriers being orthogonal to each other, and a data signal following the preamble signal, using an orthogonal frequency division multiplexing (OFDM) system;
a variable gain amplifier which amplifies signals received by the receiver; and
a gain controller which controls a gain of the variable gain amplifier depending upon the short preamble strings of the preamble signals.
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 associating at least one content with an electronic page requested by a user, the method comprising:
processing a request for the electronic page using a network routing device, the processing including:
retrieving data associated with the electronic page;
embedding by the network routing device at least one script in the electronic page, the at least one script corresponding to the at least one content and including a first Universal Resource Locator (URL);
wherein the at least one script including the first URL in the electronic page is configured based upon a user profile corresponding to a user requesting the electronic page;
executing the electronic page request such that the data associated with the electronic page includes the at least one script, the executing including replacing the first URL with a second encrypted URL corresponding to the electronic page; and
wherein the at least one script is configured to deliver the at least one content by splitting a browser into at least two frames comprising a first frame and a second frame, the first frame displaying the at least one content of the second encrypted URL and the second frame displaying the electronic page requested by the user.
2. The method of claim 1, wherein the user profile comprises at least one of an age, gender, a set content preferences and language.
3. The method of claim 1 further comprising performing a predefined action if the at least one script is blocked for a predetermined time interval.
4. The method of claim 3, wherein the predefined action comprises at least one of:
interrupting at least one service for a user; and
redirecting the user to a predefined electronic page.
5. The method of claim 4, wherein the user is redirected to the predefined electronic page in response to interrupting a service for the user.
6. The method of claim 1, wherein a content belonging to the at least one script is an advertisement.
7. The method of claim 1, wherein a content belonging to the at least one script is a toolbar.
8. The method of claim 1, wherein the at least one script is configured to deliver the content in at least one of an in-page rendering of the at least one content, an off-page rendering of the at least one content, or a frame-based rendering of the at least one content.
9. A network routing device comprising:
a transceiver; and
a processor, adaptively coupled to the transceiver and configured to:
process a request for associating at least one content with an electronic page, the request placed by a user using an electronic device in communication with the transceiver of the network routing device, the process including:
retrieving data associated with the electronic page;
embedding by the network routing device at least one script in the electronic page, the at least one script corresponding to the at least one content and including a first Universal Resource Locator (URL);
wherein the at least one script including the first URL in the electronic page is configured based upon a user profile corresponding to the user requesting the electronic page;
executing the electronic page request such that the data associated with the electronic page includes the at least one script, the executing including replacing the first URL with a second encrypted URL corresponding to the electronic page; and
wherein the at least one script is configured to deliver the at least one content by splitting a browser into at least two frames comprising a first frame and a second frame, the first frame displaying the at least one content of the second encrypted URL and the second frame displaying the electronic page requested by the user.
10. The network routing device of claim 9, wherein the electronic device comprises one of a mobile device, a Personal Digital Access (PDA), a router, a computing device, an access point and a set top box.
11. A system for associating at least one content with an electronic page requested by a user using an electronic device, the system comprising:
a network routing device in communication with the electronic device, the network routing device retrieving data associated with the electronic page requested by the user and the network routing device comprising:
an embedding module for embedding at least one script in the electronic page requested, the at least one script corresponding to the at least one content and including a first Universal Resource Locator (URL);
wherein the at least one script including the first URL in the electronic page is configured based upon a user profile corresponding to the user requesting the electronic page;
an executing module for executing the electronic page requested by the user such that the data associated with the electronic page includes the at least one script, the executing including replacing the first URL with a second encrypted URL corresponding to the electronic page;
a rendering module for rendering the at least one content along with the electronic page requested by the user in a predetermined format; and
wherein the at least one script is configured to deliver the at least one content by splitting a browser into at least two frames comprising a first frame and a second frame, the first frame displaying the at least one content of the second encrypted URL and the second frame displaying the electronic page requested by the user.
12. The system of claim 11 further comprising a redirecting module for redirecting a user to a predefined electronic page when the at least one script is blocked for a predetermined time interval.
13. The system of claim 11 further comprising a storing module for storing the at least one script.
14. A computer program product comprising a non-transitory computer usable medium having a computer readable program code embodied therein for associating at least one content along with an electronic page, the computer program code performing:
processing a request for the electronic page using a network routing device, the processing including:
retrieving data associated with the electronic page;
embedding by the network routing device at least one script in the electronic page, the at least one script corresponding to the at least one content and including a first Universal Resource Locator (URL);
wherein the at least one script including a first URL in the electronic page is configured based upon a user profile corresponding to a user requesting the electronic page;
executing the electronic page request such that the data associated with the electronic page includes the at least one script, the executing including replacing the first URL with a second encrypted URL corresponding to the electronic page; and
wherein the at least one script is configured to deliver the at least one content by splitting a browser into at least two frames comprising a first frame and a second frame, the first frame displaying the at least one content of the second encrypted URL and the second frame displaying the electronic page requested by the user.