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Transmission apparatus for transmitting data without channel encoding, for mobile radio system, forms spreading symbols having higher clock rate than symbol clock rate
Transmission apparatus for transmitting data without channel encoding, for mobile radio system, forms spreading symbols having higher clock rate than symbol clock rate
The apparatus includes a spreading-mapping device (1) for processing data symbols occurring in a symbol clock cycle to form a phase modulation signal in which the data symbols are spread using a spreading sequence comprising spreading symbols. The spreading symbols comprise a higher clock rate than the symbol clock rate by a predetermined spreading factor, so that the data symbols are converted into phase changes and the spreading symbols of the spreading sequence are converted into absolute phases of a transmission signal. A phase modulator modulates the phase of the transmission signal in accordance with the phase modulation signal. Independent claims are also included for: (1) a receiver apparatus; (2) a method of transmitting data without channel encoding; (3) a method of transmitting data; and (4) a method of receiving and evaluating a received signal.
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