JP2003283461A5 - - Google Patents

Claims (5)

In a communication apparatus in a code division multiple access mobile communication system,
A despreading unit that despreads the received signal at a plurality of designated timings;
A Rake combiner that rake combines the received signals despread at the plurality of timings from the despreader;
The despreading part is
A plurality of code generators each generating a plurality of spreading codes in response to the timing;
A multiplexer for time-multiplexing each spreading code generated from the plurality of code generators;
A register for storing a correlation value between a received signal and the time-multiplexed spreading code for each spreading code;
A multiplier for multiplying the received signal by the time-multiplexed spreading code;
A communication apparatus comprising: an adder that adds a correlation value stored in a register that stores a correlation value between a multiplication value output from the multiplier and a spread code subjected to the multiplication. The communication device according to claim 1 .
The communication apparatus, wherein the plurality of spreading codes are spreading codes assigned to a plurality of terminals. The communication device according to claim 1 .
The communication apparatus, wherein the plurality of spreading codes are spreading codes assigned to different base stations or different sectors. In a communication apparatus in a code division multiple access mobile communication system,
A despreading unit that despreads the received signal at a plurality of designated timings;
A Rake combiner that rake combines the received signals despread at the plurality of timings from the despreader;
The despreading part is
A code generator;
A plurality of status registers for storing code data input to the code generator;
A multiplexer for time-multiplexing each spread code generated by setting the code data stored in the status register in the code generator in response to the designated timing;
A register for storing a correlation value between a received signal and the time-multiplexed spreading code for each spreading code;
A multiplier for multiplying the received signal by the time-multiplexed spreading code;
A communication apparatus comprising: an adder that adds a correlation value stored in a register that stores a correlation value between a multiplication value output from the multiplier and a spread code subjected to the multiplication. In a communication apparatus in a code division multiple access mobile communication system,
A first multiplexer that switches and outputs a plurality of transmission data;
A second multiplexer for switching and outputting a plurality of spreading codes;
A multiplier for multiplying the output from the first multiplexer and the output from the second multiplexer;
A communication apparatus comprising: an output combining unit that combines outputs from the multiplier; and a radio modulation unit that performs D / A conversion on the output from the output combining unit to generate a spread spectrum signal having a carrier frequency.