Weight generation method for multi-antenna communication systems utilizing RF-based and baseband signal weighting and combining
View Patent ↗A method for processing signals is disclosed and may include performing using one or more processor and/or circuits in a receiver that uses a plurality of antennas: receiving via a channel, a plurality of RF signals by one or more of the plurality of antennas. The plurality of received RF signals may be weighted utilizing one or more corresponding RF weighting values to generate a plurality of weighted RF signals. The one or more corresponding RF weighting values may include a frequency-independent weight coefficient that is constant over the channel. At least a portion of the plurality of weighted RF signals may be combined to generate one or more combined RF signals. The one or more corresponding RF weighing values may be selected to maximize an output signal-to-noise ratio of the channel. The output signal-to-noise ratio may be averaged over the channel.
1. A method for processing signals, the method comprising:
performing using one or more processor and/or circuits in a receiver comprising a plurality of antennas:
receiving via a channel, a plurality of RF signals by one or more of said plurality of antennas;
weighting said plurality of received RF signals utilizing one or more corresponding RF weighting values to generate a plurality of weighted RF signals, wherein said one or more corresponding RF weighting values comprise a frequency-independent weight coefficient that is constant over said channel; and
combining at least a portion of said plurality of weighted RF signals to generate one or more combined RF signals.
2. The method according to claim 1 , comprising selecting said one or more corresponding RF weighing values to maximize an output signal-to-noise ratio (SNR) of said channel.
3. The method according to claim 2 , comprising averaging said output signal-to-noise ratio over said channel.
4. The method of claim 2 , comprising averaging said output signal-to-noise ratio in time domain over a time response of said channel.
5. The method of claim 2 , comprising averaging said output signal-to-noise ratio in frequency domain over a channel bandwidth of said channel.
6. The method of claim 5 , wherein said channel bandwidth is equivalent to a bandwidth of a plurality of RF signals transmitted via said channel, said plurality of transmitted RF signals corresponding to said plurality of RF signals received by said one or more of said plurality of antennas.
7. The method of claim 1 , comprising calculating said one or more corresponding RF weighting values using an Eigenvector corresponding to a largest Eigenvalue of a channel cross-correlation matrix for said channel, which is averaged over said channel.
8. The method of claim 7 , wherein said channel cross-correlation matrix is averaged over said channel in frequency domain.
9. The method of claim 7 , wherein said channel cross-correlation matrix is averaged over a corresponding channel delay profile of said channel.
10. A system for processing signals, the system comprising:
one or more processors and/or circuits for use in a receiver that comprises a plurality of antennas, wherein said one or more processors and/or circuits are operable to:
receive via a channel, a plurality of RF signals by one or more of said plurality of antennas;
weight said plurality of received RF signals utilizing one or more corresponding RF weighting values to generate a plurality of weighted RF signals, wherein said one or more corresponding RF weighting values comprise a frequency-independent weight coefficient that is constant over said channel; and
combine at least a portion of said plurality of weighted RF signals to generate one or more combined RF signals.
11. The system according to claim 10 , wherein said one or more processors and/or circuits are operable to select said one or more corresponding RF weighing values to maximize an output signal-to-noise ratio (SNR) of said channel.
12. The system according to claim 11 , wherein said one or more processors and/or circuits are operable to average said output signal-to-noise ratio over said channel.
13. The system of claim 11 , wherein said one or more processors and/or circuits are operable to average said output signal-to-noise ratio in time domain over a time response of said channel.
14. The system of claim 11 , wherein said one or more processors and/or circuits are operable to average said output signal-to-noise ratio in frequency domain over a channel bandwidth of said channel.
15. The system of claim 14 , wherein said channel bandwidth is equivalent to a bandwidth of a plurality of RF signals transmitted via said channel, said plurality of transmitted RF signals corresponding to said plurality of RF signals received by said one or more of said plurality of antennas.
16. The system of claim 10 , wherein said one or more processors and/or circuits are operable to calculate said one or more corresponding RF weighting values using an Eigenvector corresponding to a largest Eigenvalue of a channel cross-correlation matrix for said channel, which is averaged over said channel.
17. The system of claim 16 , wherein said one or more processors and/or circuits are operable to average said channel cross-correlation matrix over said channel in frequency domain.
18. The system of claim 16 , wherein said one or more processors and/or circuits are operable to average said channel cross-correlation matrix over a corresponding channel delay profile of said channel.