| 摘要 |
PURPOSE: A frequency multiplexing PC-CDMA(parallel combinatory code-division multiple access) system is provided to reduce the system size and to improve system efficiency by reducing number of correlators and data identifiers. CONSTITUTION: Many data bits are converted to corresponding PN(pseudo noise) codes. The PN codes are mixed with orthogonal frequency signals and transmitted by a transmitter. A receiver identifies the PN codes to restore the original data. A storing unit stores PN code data obtained by mixing the frequency signals. A multiplexer(53) successively decodes the PN code data in code units. A correlator(54) transmits a level signal correlated with the PN code. A data identifier identifies the transmitted data based on the level signal output from the correlator(54).
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