Transmission and reception of signals in a communication systems

Details Transmission and reception of signals in a communication systems Transmission and reception of signals in a communication systems

1997-11-21

1999-10-26

Vo, Nguyen

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

455525, 455553, 370477, H04Q 720

Patent

active

059743190

ABSTRACT:
A dual-mode mobile station (125) transmits an AMPS signal (Td AMPS) concurrently during transmission of a DS CDMA signal (Td DS CDMA) for purposes of handoff of the mobile station from the DS CDMA system to AMPS. Scanning receivers (221) at surrounding AMPS base-stations (135-138) measure the quality of the AMPS signal (Td AMPS) and determine the best base-station for handoff. To ensure a strong signal during concurrent transmission, other mobile stations not undergoing handoff are instructed to notch their transmissions during transmission by mobile station (125) of the AMPS signal (Td AMPS).

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Webster's II New Riverside University Dictionary, 1984, pp. 295 & 299.

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