Method and apparatus for radio communications

摘要: A method (and apparatus) of receiving (and/or transmitting) a wanted modulated radio frequency signal with reduced locally generated noise. In the case reception, comprises steps 99 ; generating high local oscillator 71,72 , which can be mathematically described as having fixed ω RF responding to carrier wave and phase φ SS varies in time according predetermined function; mixing received generate mixed 111,116 so spread band-width it is mixed. The then converted from an analogue into digital 121,122 . low 61,62,63,64 generated, zero function when delayed by delay corresponding taken for propagate between first step 110,115 second 300 recover recovered 131,132 including both despread base-band whose not dependent on noise upon function. transmission, transmitted subsequently transmitter