发明名称 |
Digital power encoder for direct digital-RF transmitter |
摘要 |
A transmitter includes a first digital up-converter for converting data to an intermediate frequency (IF) signal, a pulse width modulator (PWM) for encoding the IF signal to an IF pulse train, a second digital up-converter for converting the IF pulse train to a radio frequency (RF) pulse train, a power amplifier for amplifying the RF pulse train; and a filter for reconstructing a RF analog signal from the amplified RF pulse train. |
申请公布号 |
US8953670(B1) |
申请公布日期 |
2015.02.10 |
申请号 |
US201314063518 |
申请日期 |
2013.10.25 |
申请人 |
Mitsubishi Electric Research Laboratories, Inc. |
发明人 |
Ma Rui;Zhu Qiuyao;Teo Koon Hoo;Duan Chunjie |
分类号 |
H03K7/08;H03K9/08;H04B1/04;H04L25/49 |
主分类号 |
H03K7/08 |
代理机构 |
|
代理人 |
Brinkman Dirk;Vinokur Gene |
主权项 |
1. A transmitter, comprising:
a first digital up-converter for converting data to an intermediate frequency (IF) signal; a pulse width modulator (PWM) for encoding the IF signal to an IF pulse train; a second digital up-converter for converting the IF pulse train to a radio frequency (RF) pulse train; a power amplifier for amplifying the RF pulse train; and a filter for reconstructing a RF analog signal from the amplified RF pulse train, and wherein the PWM is a multi-level PWM, further comprising: a splitter for duplicating the IF signal; two multi-level quantizers, each quantizer quantizes the IF signal based on the comparison of the IF signal with a set of thresholds to produce two waveforms; and a combiner for combining the two waveforms to produce the IF pulse train, and the two multi-level quantizers includes a first quantizer and a second quantizer, and the set of thresholds includes a first set of thresholds and a second set of threshold, and wherein values of the threshold in the first set are opposite to values of the threshold in the second set. |
地址 |
Cambridge MA US |