Patent ID: 8837563
Filing Date: 2014-09-16
Classification: H04B,H04L

Abstract:
1. A wireless communication system comprising: one or more antenna elements; a first wireless transceiver comprising: (a) a modem, and (b) one or more Radio Frequency (RF) chain pairs, wherein at least one RF chain pair includes: (i) a receive chain (RX), and (ii) a transmit chain (TX); a sounding circuit block comprising: (a) a receive chain (RX), (b) a transmit chain (TX); and control circuitry adapted to coordinate: (1) reception of sounding signals from said first wireless transceiver, and (2) transmission of sounding signals to said first wireless transceiver; and a calibrated switchable bridging block (CSBB) switchably coupling signals between said first transceivers and said sounding circuit block, said CSBB comprising: a controllable signal switch having known channel characteristics between ports of said switch.