Telecommunications – Receiver or analog modulated signal frequency converter – Plural receivers
Patent
1991-09-18
1994-01-18
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Plural receivers
375100, 455137, 4552771, H04B 702
Patent
active
052806375
ABSTRACT:
A phase combining method and apparatus for use in a diversity reception radiotelephone is described. The phase combining method and apparatus is a hybrid diversity technique which combines elements of maximal ratio combining (MRC) and level comparison selection diversity, which results in a simple and effective implementation of a diversity receiver with superior performance. The diversity receiver demodulates the received signals, extracts the phase, forming two phase signals. Then, the two phase signals are combined to form a third phase signal. One of the three phase signals is selected to be used for interpretation of a symbol in the Quadrature Phase Shift Keying (QPSK) constellation. The selection process is based on the received signal strength of the received signals.
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All Digital Adaptive Carrier Tracking Coherent Demodulator, Shigeki Saito, Harui Yamamoto, Yasushi Yamao. NTT Radio Communication System Laboratories, pp. 9-10.
Carney Michael J.
LaRosa Christopher P.
Dailey Kirk W.
Eisenzopf Reinhard J.
Hackbart Rolland R.
Motorola Inc.
Motsinger F. John
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