公开(公告)号：EP1370037A2

公开(公告)日：2003-12-10

申请号：EP03100950.9

申请日：2003-04-08

Applicant: Telogy Networks Inc.

Inventor： Modlin, Cory Samuel

IPC: H04L25/03

CPC classification number: H04L1/245 ,  H04L1/0054 ,  H04L1/006 ,  H04L25/03057 ,  H04L25/03203 ,  H04L25/03343 ,  H04L25/4927 ,  H04L2025/03363

Abstract: 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.

Abstract translation: 描述了用于设计数字通信网络中的上游PCM的均衡器（32）和跟踪性能的方法。 本发明优化了在客户端调制解调器和服务器调制解调器之间的网络中的数据传输的上行数据速率。 在训练期间，上行信道脉冲响应（46）被识别为补偿任何抢占位信令。 基于识别的信道（34），以封闭形式计算上行发送均衡器（32）。 接收机（41）中的均衡器也用于跟踪定时和信道变化。 本发明通过查找格码解码器中的代码违例并跟踪其频率来近似误码率性能。 误码率用于确定当前调制解调器参数是否需要重新设计。

公开(公告)号：EP1363431A3

公开(公告)日：2004-02-25

申请号：EP03100951.7

申请日：2003-04-08

Applicant: Telogy Networks Inc.

Inventor： Modlin, Cory Samuel

IPC: H04L25/49 ,  H04L1/00

CPC classification number: H04L25/4927 ,  H04L1/0003

Abstract: A method for constellation design in a telecommunications network (10) using pulse code modulation to transmit data signals upstream (30) between client and server voice-band modems (12,26). The invention selects a constellation for transmission over an analog channel of an equivalence class of data points using pulse code modulation based on the presence or absence of robbed bit signaling and interference from echo levels. The constellation is designed by determining noise in a PCM channel using a cumulative distribution function for echo (90), determining the extent of said noise for an array of possible constellation points (92), and selecting constellation points such that the largest negative noise of a first point remains above the largest positive noise level of a neighboring second point (94). Constellations are created off-line and stored (96) for retrieval during modulation depending on the level of the echo.

Abstract translation: 一种用于电信网络（10）中的星座设计的方法，所述电信网络（10）使用脉冲编码调制来在客户端和服务器语音频带调制解调器（12,26）之间向上游（30）传输数据信号。 本发明基于是否存在夺位信令和来自回波电平的干扰，使用脉码调制来选择用于在等效类别的数据点的模拟信道上传输的星座。 通过使用回声（90）的累积分布函数来确定PCM信道中的噪声，确定一组可能星座点（92）的所述噪声的程度，并且选择星座点以使得最大负噪声为 第一点保持在相邻第二点（94）的最大正噪声水平之上。 离线创建星座并存储（96）以在调制期间取回，取决于回声的级别。

公开(公告)号：EP1370037A3

公开(公告)日：2007-05-30

申请号：EP03100950.9

申请日：2003-04-08

Applicant: Telogy Networks Inc.

Inventor： Modlin, Cory Samuel

IPC: H04L25/03 ,  H04L1/00

CPC classification number: H04L1/245 ,  H04L1/0054 ,  H04L1/006 ,  H04L25/03057 ,  H04L25/03203 ,  H04L25/03343 ,  H04L25/4927 ,  H04L2025/03363

Abstract: 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(公告)号：EP1363431B1

公开(公告)日：2018-11-14

申请号：EP03100951.7

申请日：2003-04-08

Applicant: Telogy Networks Inc.

Inventor： Modlin, Cory Samuel

IPC: H04L25/49 ,  H04L1/00

CPC classification number: H04L25/4927 ,  H04L1/0003

Abstract: A method for constellation design in a telecommunications network (10) using pulse code modulation to transmit data signals upstream (30) between client and server voice-band modems (12,26). The invention selects a constellation for transmission over an analog channel of an equivalence class of data points using pulse code modulation based on the presence or absence of robbed bit signaling and interference from echo levels. The constellation is designed by determining noise in a PCM channel using a cumulative distribution function for echo (90), determining the extent of said noise for an array of possible constellation points (92), and selecting constellation points such that the largest negative noise of a first point remains above the largest positive noise level of a neighboring second point (94). Constellations are created off-line and stored (96) for retrieval during modulation depending on the level of the echo.

公开(公告)号：EP1363431A2

公开(公告)日：2003-11-19

申请号：EP03100951.7

申请日：2003-04-08

Applicant: Telogy Networks Inc.

Inventor： Modlin, Cory Samuel

IPC: H04L25/49 ,  H04L1/00

CPC classification number: H04L25/4927 ,  H04L1/0003

Abstract: A method for constellation design in a telecommunications network (10) using pulse code modulation to transmit data signals upstream (30) between client and server voice-band modems (12,26). The invention selects a constellation for transmission over an analog channel of an equivalence class of data points using pulse code modulation based on the presence or absence of robbed bit signaling and interference from echo levels. The constellation is designed by determining noise in a PCM channel using a cumulative distribution function for echo (90), determining the extent of said noise for an array of possible constellation points (92), and selecting constellation points such that the largest negative noise of a first point remains above the largest positive noise level of a neighboring second point (94). Constellations are created off-line and stored (96) for retrieval during modulation depending on the level of the echo.

Abstract translation: 一种用于在电信网络（10）中使用脉码调制以在客户端和服务器语音频带调制解调器（12,26）之间上行传输数据信号（30）的星座设计的方法。 本发明通过使用脉冲编码调制基于有无位带信令的存在或不存在以及来自回声电平的干扰来选择用于在等效数据类的模拟信道上进行传输的星座。 通过使用回波（90）的累积分布函数确定PCM信道中的噪声，确定可能的星座点阵列（92）的所述噪声的范围，以及选择星座点，使得最大负噪声 第一点保持在相邻第二点（94）的最大正噪声电平之上。 星座是离线创建并存储（96），用于在调制期间根据回波的水平进行检索。