METHOD FOR GENERATING CODE RELATED TO PREAMBLE IN RANDOM ACCESS CHANNEL

摘要

PROBLEM TO BE SOLVED: To provide a CDMA transmission and reception system that ensures high quality transmission and reception notwithstanding a communication distance and the Doppler effects.

SOLUTION: A detector of the system detects a received digital signature using an energy output from a matched filter. The energies are tabulated according to an anticipated signature pattern for variable transmission distances. The tabulation accounts for expected round trip transmission delays and allows processing of the accumulated symbols to derive a correct signature independently of whether coherent or non-coherent signature coding is used and multiple Doppler channels are present.

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