| 摘要 |
Subscriber unit for a wireless digital telephone communications system in which the subscriber unit comprises coding/decoding means and an associated processing unit for the re-coding of an input signal in order to produce digital input symbols, FIR (final impulse response) means which respond to the processing unit to provide FIR-filtered digital input symbols, a radio to transmit a signal, which comprises the information present in the FIR-filtered digital input symbols, to a second unit within the system and for demodulating an output signal received from the second unit, the processing unit composing digital output signals from the demodulated output signal, the FIR means being implemented as an FIR chip, which comprises: means for internal address decoding to enable the processing unit to gain access to internal functions of the FIR chip; control and status registers which enable the processing unit to read the status of the FIR chip and to control internal functions thereof; means for the filtering, with final impulse response, of the digital input symbols and means for controlling the timing which enables the processing unit to control the FIR filter means.
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