发明公开
- 专利标题： Pcm upstream data transmission server
- 专利标题（中）： 变频器PCMDatenübertragungsserver
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申请号： EP03100950.9申请日： 2003-04-08
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公开(公告)号： EP1370037A2公开(公告)日： 2003-12-10
- 发明人: Modlin, Cory Samuel
- 申请人： Telogy Networks Inc.
- 申请人地址： 20450 Century Boulevard Germantown, MD 20874 US
- 专利权人： Telogy Networks Inc.
- 当前专利权人： Telogy Networks Inc.
- 当前专利权人地址： 20450 Century Boulevard Germantown, MD 20874 US
- 代理机构： Holt, Michael
- 优先权： US118377 20020409
- 主分类号： H04L25/03
- IPC分类号： H04L25/03
摘要：
A method for designing an equalizer (32) and tracking performance for upstream PCM in a digital communications network is described. The invention optimizes upstream data rates for data transmissions in a network between a client modem and a server modem. During training, the upstream channel impulse response (46) is identified compensating for any robbed bit signaling. The upstream transmit equalizer (32) is computed in closed form based on the identified channel (34). An equalizer in the receiver (41) is also used to track timing and channel variations. The invention approximates bit error rate performance by looking for code violations in the trellis code decoder and tracking their frequency. The bit error rate is used to determine if the current modem parameters need to be re-designed.
公开/授权文献
- EP1370037A3 PCM upstream data transmission server 公开/授权日：2007-05-30
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