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LT5528 WCDMA ACPR和AltCPR测量

  • 资源大小:65 K
  • 上传时间: 2013-11-02
  • 上传用户:cenhalin
  • 资源积分:2 下载积分
  • 标      签: AltCPR WCDMA 5528 ACPR

资 源 简 介

 

ACPR (adjacent channel power ratio), AltCPR (alternatechannel power ratio), and noise are important performancemetrics for digital communication systems thatuse, for example, WCDMA (wideband code division multipleaccess) modulation. ACPR and AltCPR are bothmeasures of spectral regrowth. The power in the WCDMAcarrier is measured using a 5MHz measurement bandwidth;see Figure 1. In the case of ACPR, the total powerin a 3.84MHz bandwidth centered at 5MHz (the carrierspacing) away from the center of the outermost carrier ismeasured and compared to the carrier power. The resultis expressed in dBc. For AltCPR, the procedure is thesame, except we center the measurement 10MHz awayfrom the center of the outermost carrier.

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