Preamble based selection diversity in a time division multiple a

Details Preamble based selection diversity in a time division multiple a Preamble based selection diversity in a time division multiple a

1996-12-03

2000-02-29

Horabik, Michael

Telecommunications

Receiver or analog modulated signal frequency converter

With wave collector

455273, 370334, 370347, H04B 106, H04B 7212, H04Q 700

Patent

active

060320338

ABSTRACT:
A selection diversity system and method for use in a TDMA (time division multiple access) radio system, particularly suited for DECT (Digital Enhanced Cordless Telephone) or PWT (personal wireless telephony) applications. A digitized version of a received signal is buffered long enough to allow selection diversity measurements to occur without corrupting the demodulation of the desired signal. While the received signal is being buffered, a single receiver makes a performance measurement on each of two antennas in sequence during the beginning of a received data burst, the beginning of the burst being determined by a timing signal fed back from a previous burst. The previously unused antenna is measured first to minimize the likelihood of having to perform two antenna switches. Also while the received signal is buffered, timing recovery and frequency offset correction are performed.

REFERENCES:
patent: 4977616 (1990-12-01), Linder et al.
patent: 5097484 (1992-03-01), Akaiwa
patent: 5203024 (1993-04-01), Yamao
patent: 5369801 (1994-11-01), Smith
patent: 5446922 (1995-08-01), Siwiak et al.
patent: 5724666 (1998-03-01), Dent
patent: 5884178 (1999-03-01), Ericsson et al.

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