| 摘要 |
A CDMA transmitter and receiver has a transmission assembly including a serial-to-parallel converter for converting transmission data into a modulation input wave composed of real and imaginary parts of a complex number, a pseudo random noise (PN) generator for generating real and imaginary parts of a complex spread spectrum code in which real and imaginary parts are uncorrelated and random, a spread spectrum modulator for effecting modulation on the transmission data by producing complex numbers of the modulation input wave from the serial-to-parallel converter and the complex spread spectrum code from the PN generator, a vector combiner for combining real and imaginary part signals outputted from the spread spectrum modulator, a transmit filter for limiting a band of an output signal from the vector combiner. The CDMA transmitter and receiver have a reception assembly including a receive filter for limiting a band of a received signal from the transmission assembly, a fractionally tap spacing equalizer for sampling the received signal at a rate which is an integral multiple of a chip rate thereof, and a waveform equalizer comprising a tranveral digital filter which uses a recursive least square adaptive algorithm for updating filter coefficients.
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