公开(公告)号：WO1997048197A2

公开(公告)日：1997-12-18

申请号：PCT/US1997008533

申请日：1997-05-20

Applicant: ADC TELECOMMUNICATIONS, INC.

Inventor： ADC TELECOMMUNICATIONS, INC. ,  DAPPER, Mark, J. ,  GEILE, Michael, J. ,  HILL, Terrance, J. ,  ROBERTS, Harold, A. ,  ANDERSON, Brian, D. ,  BREDE, Jeffrey ,  WADMAN, Mark, S. ,  KIRSCHT, Robert, J. ,  HERRMANN, James, J. ,  FORT, Michael, J. ,  BUSKA, Steven, P. ,  SOLUM, Jeff ,  ENFIELD, Debra, Lea ,  BERG, Darrell ,  SMIGELSKI, Thomas ,  TUCKER, Thomas, C. ,  HALL, Joe ,  LOGAJAN, John, M. ,  BOUALOUANG, Somvay ,  LOU, Heng ,  ELPERS, Mark, D. ,  DOWNS, Matt ,  FERRIS, Tammy ,  OPOCZYNSKI, Adam ,  RUSSELL, David, S.

IPC: H04J00/00

CPC classification number: H04W24/00 ,  G06F17/14 ,  G06F17/142 ,  H03M13/1515 ,  H03M13/356 ,  H04B10/272 ,  H04H20/69 ,  H04H20/77 ,  H04H20/78 ,  H04H20/79 ,  H04H20/80 ,  H04H60/11 ,  H04H60/86 ,  H04H60/96 ,  H04H60/97 ,  H04J3/14 ,  H04J14/0298 ,  H04K1/00 ,  H04K3/226 ,  H04K3/255 ,  H04L1/004 ,  H04L1/0045 ,  H04L1/0057 ,  H04L1/0071 ,  H04L1/24 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0044 ,  H04L5/023 ,  H04L5/14 ,  H04L5/143 ,  H04L5/1484 ,  H04L12/10 ,  H04L12/12 ,  H04L12/2801 ,  H04L12/44 ,  H04L25/03866 ,  H04L27/2601 ,  H04L27/2608 ,  H04L27/2614 ,  H04L27/2626 ,  H04L27/2628 ,  H04L27/2634 ,  H04L27/2647 ,  H04L27/265 ,  H04L27/2652 ,  H04L27/2655 ,  H04L27/2657 ,  H04L27/2662 ,  H04L27/34 ,  H04L41/0213 ,  H04L41/064 ,  H04L41/0896 ,  H04L43/00 ,  H04L43/022 ,  H04L43/067 ,  H04L43/0811 ,  H04L43/0817 ,  H04L43/0823 ,  H04L43/0829 ,  H04L43/0847 ,  H04L43/0852 ,  H04L43/0858 ,  H04L43/0864 ,  H04L43/0882 ,  H04L43/16 ,  H04L2001/0093 ,  H04L2027/0036 ,  H04L2027/0057 ,  H04L2027/0067 ,  H04M7/006 ,  H04M9/027 ,  H04N7/17309 ,  H04N7/22 ,  H04N21/2221 ,  H04N21/2383 ,  H04N21/2385 ,  H04N21/2402 ,  H04N21/4382 ,  H04N21/6118 ,  H04N21/6137 ,  H04N21/6168 ,  H04W24/08 ,  Y02D50/40 ,  Y02D50/42

Abstract: The comminication system includes a hybrid fiber/coax distribution network. A head end provides for downstream transmission of telephony and control data in a first frequency bandwidth over the hybrid fiber/coax distribution network and reception of upstream telephony and control data in a second frequeny bandwidth over the hybrid fiber/coax distribution network. The head end includes a head end multicarrier modem for modulating at least downstream telephony information on a plurality of orthogonal carriers in the first frequency bandwodth and demodulating at least upstream telephony information modulated on a plurality of orthogonal carriers in the second frequency bandwidth. The head end further includes a controller operatively connected to the head en multicarrier modem for controlling transmission of the downstream telephony information and downstream control data and for controlling receipt of the upstream control data and upstream telephony information. The system further includs service units, each service unit operatively connected to the hybrid fiber/coax distribution network for upstream transmission of telephony and control data in the second frequency bandwidth and for receipt of the downstream control data and telephony in the first frequency bandwidth. Each service unit includes a service unit multicarrier modem for modulation at least the upstream telephony information on at least one carrier orthogonal at the head end terminal to another carrier in the second frequency bandwidth and for demodulating at least the downstream telephony information modulated on at least a band of a plurality of orthonogal carriers in the first frequency bandwidth. Each service unit also includes a controller operatively connected to the service unit multicarrier modem for controlling the modulation of and demodulation performed by the service unit multicarrier modem. A method of monitoring communication channels, a distributed loop method for adjusting transmission characteristics to allow for transmission of data in a multi-point to point communication system, a polyphase filter technique for providing ingress protection and a scanning method for indetifying frequency bands to be used for transmission by service units are also included. Also provided is a method and apparatus for performing a Fast Fourier Transform (FFT). In one embodiment, a scalable FFT system is built using a novel dual-radix butterfly core.

Abstract translation: 粉碎系统包括混合纤维/同轴电缆分配网络。 头端提供在混合光纤/同轴电缆分配网络上的第一频带中的电话和控制数据的下行传输，并且通过混合光纤/同轴电缆分配网络以第二频带宽度接收上行电话和控制数据。 前端包括头端多载波调制解调器，用于在第一频带中对多个正交载波调制至少下游电话信息，并且解调至少在第二频带中的多个正交载波上调制的上行电话信息。 前端还包括可操作地连接到多载波调制解调器头部的控制器，用于控制下游电话信息和下游控制数据的传输，并用于控制上游控制数据和上游电话信息的接收。 该系统还包括服务单元，每个服务单元可操作地连接到混合光纤/同轴电缆分配网络，用于电话的上行传输和第二频率带宽中的控制数据，以及用于在第一频带中接收下游控制数据和电话。 每个服务单元包括服务单元多载波调制解调器，用于至少将在头端终端正交的至少一个载波的第二频带中的上行电话信息调制到第二频带中的另一载波，并且用于至少解调至少在一个 在第一频率带宽中的多个orthonogal载波的频带。 每个服务单元还包括可操作地连接到服务单元多载波调制解调器的控制器，用于控制由服务单元多载波调制解调器执行的调制和解调。 监视通信信道的方法，用于调整传输特性以允许多点到点通信系统中的数据传输的分布式环路方法，用于提供入口保护的多相滤波器技术和用于使用频带的扫描方法 也包括服务单位的传输。 还提供了一种用于执行快速傅里叶变换（FFT）的方法和装置。 在一个实施例中，使用新颖的双核蝴蝶核心构建可扩展FFT系统。