초록 ▼

A method and apparatus is provided for creating a composite waveform. This composite waveform is created by coding a plurality of input digital information signals. Subsequently, the plurality of coded input digital information signals are communicated over a communication medium to a digital combin

A method and apparatus is provided for creating a composite waveform. This composite waveform is created by coding a plurality of input digital information signals. Subsequently, the plurality of coded input digital information signals are communicated over a communication medium to a digital combiner. The digital combiner combines the plurality of coded input digital information signals. Finally, the digitally combined information signal is spectrally shaped to form a composite waveform. These composite waveform creation principals may be applied to digitally encoded voice subbands in a subband coding system as well as channel information in a direct sequence code division multiple access (DS-CDMA) communication system transmitter.

대표청구항 ▼

[ What is claimed is:] [1.] A method of creating a composite waveform, comprising:(a) demultiplexing an input signal waveform into a plurality of baseband signals, each associated with separate spectral subbands, and decoding the plurality of baseband signals to form a plurality of scaled samples, e

[ What is claimed is:] [1.] A method of creating a composite waveform, comprising:(a) demultiplexing an input signal waveform into a plurality of baseband signals, each associated with separate spectral subbands, and decoding the plurality of baseband signals to form a plurality of scaled samples, each associated with one of the separate spectral subbands;demultiplexing a second input signal waveform into a second plurality of baseband signals, each associated with the separate spectral subbands, and decoding the second plurality of baseband signals to form a second plurality of scaled samples, each associated with one of the separate spectral subbands;(b) digitally combining, by respective spectral subband, each of the plurality ofscaled samples with each of the second plurality of scaled samples in a digital combiner to form a plurality of combined subband samples, each associated with one of the separate spectral subbands; and(c) spectrally shaping the plurality of combined subband samples to form a composite waveform.