H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 7/02 (2006.01) H04B 7/10 (2006.01) H04L 5/02 (2006.01) H04L 27/34 (2006.01)
Patent
CA 2449751
Techniques for increasing the capacity of a radio link, using radio signal superimposing in space and frequency and subsequent signal restoration, are described. Each of the transmitting and receiving systems are connected to a plurality of collocated antennas. The signals that are superimposed are recovered by one or a plurality of restorers. The disclosed method of signal processing involves appropriate filtering of signals, then summing them in order to restore the original individual signals and to cancel out all undesired signals received as a result of superimposing. Preferably, the spacing between antennas is optimized so that while the undesired signals are minimized or canceled out, the restored signals are maximized. In simple situations, signal filtering may be reduced to phase adjustment of the signals and the restoration may be done at RF, IF or baseband. In more complex situations, general adaptive filters implemented in baseband may be preferred. Various embodiments of the restorer are presented.
Scott Ken
Sendyk Andrew M.
Creative Signal Solutions Inc.
Gowling Lafleur Henderson Llp
LandOfFree
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