Vectorial combiner for diversity reception in rf transceivers

H - Electricity – 04 – B

Patent

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Details

H04B 7/08 (2006.01) H04B 7/02 (2006.01) H04L 1/06 (2006.01) H04L 27/00 (2006.01) H04Q 7/20 (2006.01)

Patent

CA 2412924

A combiner for use in a diversity radio receiver (FM) which receives a plurality of diversity I and Q modulated signals each carrying I and Q information signals through spatially separated antennas, the received I and Q signal pairs being digitized at a sampling rate T and converted to baseband I and Q signals. Each converted I and Q signal pair represents a diversity I and Q vector which is input to the combiner. A discriminator is provided for each sample stream of diversity I and Q vectors input ,to the combiner. Each discriminator produces, for each sample, an output discriminated I and Q vector (l.DELTA., Q.DELTA.) having a phase representative of the frequency of the information signal and an amplitude proportional to the power of the information signal. Adders separately add together the discriminated I signals (lo) to produce a combined discriminated I signal (I c.DELTA.) and the discriminated Q signals (Q.DELTA.) to produce a combined discriminated Q signal (Q c.DELTA.), whereby the combined discriminated I and Q signals represent a combined discriminated vector (I c.DELTA, Q c.DELTA) having a phase determined by one or more of the phases of said diversity I and Q vectors depending upon the relative powers of said diversity I and Q vectors. A phase accumulator adds to an accumulation vector, over successive samples, the phases of the combined discriminated vectors (l c.DELTA., Q c.DELTA.) to produce an output combined I and Q signal pair (Ic, Qc).

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