Synthetic path diversity repeater

Details Synthetic path diversity repeater Synthetic path diversity repeater

2003-08-07

2009-08-25

Trinh, Tan (Department: 2618)

Telecommunications

Carrier wave repeater or relay system

Portable or mobile repeater

C455S007000, C455S456100, C455S016000

Reexamination Certificate

active

07580672

ABSTRACT:
A communication repeater for use in conjunction with a base transceiver subsystem (BTS) of a wireless communication system. The repeater expands the coverage area of the BTS and allows receivers to identify whether the source of a communication signal was directly from a BTS or was broadcast by a repeater. Identification of the signal source facilitates position determination, particularly in hybrid position determination systems. The repeater implements differential delay modulation of the transmitted signal. The repeater re-transmits the original BTS signal as well as a time delayed version of the signal. Additionally, the repeater introduces synthetic path diversity in the form of spatial diversity or polarity diversity to de-correlate the re-transmitted original signal from the time delayed signal. The repeater can broadcast the delayed signal with the same power as the re-transmitted original signal or can attenuate the delayed signal relative to the re-transmitted original signal.

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