| 摘要 |
A clock rate modulation spread spectrum (CRM-SS) communication system is provided in which a bit error rate on a receiver side is minimized by controlling at least one of parameters defining a phase error. The CRM-SS communication system uses a delay locked loop comprising an n DELTA -type delay locked loop, where 0<n</=2. A sum of a plurality of phase errors generated by different causes are calculated. A receiver and/or transmitter is controlled by varying one of parameters including a loop gain K and a linear region n DELTA of the phase comparison characteristic of the delay locked loop, a modulation index beta , a transmission rate fm, a transmission power P and a chip width DELTA , in accordance with the sum calculated by the calculating means so that a bit error rate in the receiver is minimized.
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