1. In an OFDM-based receiver, a channel sounder comprising:
A. means for extracting pilot signals contained in the OFDM received signal;
B. means for analyzing the pilot signals in the frequency domain and for issuing signals indicative of a distortion in each pilot signal, wherein each of said pilot distortion signals comprises both an amplitude and a phase component; and
C. means for analyzing the signals indicative of a distortion in each pilot signal and for computing therefrom corrective signals for correcting distortions in the received signal, further including means for computing an average distortion of two adjacent pilots and for using that average to correct the information between these pilots.
2. In an OFDM based receiver, a channel sounder comprising:
A. means for extracting pilot signals contained in the OFDM received signal;
B. means for analyzing the pilot signals in the frequency domain and for issuing signals indicative of a distortion in each pilot signal, wherein each of said pilot distortion signals comprises both an amplitude and a phase component; and
C. means for analyzing the signals indicative of a distortion in each pilot signal and for computing therefrom corrective signals for correcting distortions in the received signal, further including means for computing, for each frequency between two adjacent pilots, an interpolated value of the distortion, and for using that interpolated value to correct the information at that frequency.
3. The channel sounder according to claim 2, wherein the interpolation is performed in the time domain or the frequency domain.
4. The channel sounder according to claim 2, wherein the interpolation is performed using a low pass filter or a FIR or convolver.
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 beach towel stake comprising;
a cap having a top, a bottom, and an outer edge;
a viewing notch, wherein said outer edge of said cap defines a notch therein to comprise said viewing notch;
a shaft having opposing ends with one end attached to said bottom of said cap;
a catch hook attached to said one end of said shaft; and
said viewing notch positioned directly above said catch hook.