| 摘要 |
<p>The envelope elimination and restoration (eer) modulator comprises look-up table means 50, envelope post-processing means 61, phase post-processing means 62, envelope Digital to Analogue Converter (DAC) 71, phase DAC 72 and power amplifier 80. Bit generation means 10 represents the circuitry associated with the modulator which generates the data to be communicated or transmitted by the modulator (e.g. vocoder, channel codec, burst formatter, etc.) and aerial 90 is the means from which the output modulated carrier signal is broadcast. Look-up table means 50 enables a direct conversion from the bit stream to polar type signals including an envelope signal and a phase signal. <IMAGE></p> |
