Patent ID: 6144694
Filing Date: 2000-11-07
Classification: H04B

Abstract:
A transmitting apparatus for code division multiplexed signals comprising:means of generating a spread-spectrum code division multiplexed signal;an amplitude limiter which limits the amplitude of the code division multiplexed signal;a first baseband filter which limits the bandwidth of the output signal of said amplitude limiter; andan output section including circuits for converting in frequency the output signal of said baseband filter to provide a carrier frequency and amplifying the converted signal, wherein said amplitude limiter comprises a second baseband filter which limits the bandwidth of one split version of the code division multiplexed signal; a control circuit which produces, from the output signal of said second baseband filter, an attenuation control signal for controlling the amplitude of the transmission signal; a delay circuit which delays another split version of the code division multiplexed signal by the extent of the tap length of said second baseband filer; and an attenuator which attenuates the output signal of said delay circuit in response to the attenuation control signal such that the amplitude of the output signal of said first baseband filter is confined within a prescribed amplitude.