公开(公告)号：WO1995009494A1

公开(公告)日：1995-04-06

申请号：PCT/US1994011122

申请日：1994-09-28

Applicant: PACIFIC COMMUNICATION SCIENCES, INC.

Inventor： PACIFIC COMMUNICATION SCIENCES, INC. ,  WRIGHT, David ,  PETRANOVICH, James, E. ,  BAKER, Rex, L. ,  RIEDEL, Neal, K.

IPC: H04L01/02

CPC classification number: H04L1/0019 ,  A63B21/00178 ,  A63B21/00181 ,  A63B21/0058 ,  A63B21/4047 ,  A63B22/0012 ,  A63B22/0015 ,  A63B22/0023 ,  A63B22/203 ,  A63B23/03575 ,  A63B23/0417 ,  A63B2022/206 ,  A63B2071/025 ,  B22F9/082 ,  B22F2201/02 ,  B22F2998/00 ,  B22F2998/10 ,  B22F2999/00 ,  C22C33/0257 ,  H03G3/001 ,  H03G3/3052 ,  H04B7/0805 ,  H04B7/0808 ,  H04B7/0814 ,  H04L1/0001 ,  H04L1/0061 ,  H04L1/06 ,  H04L1/20 ,  B22F3/16 ,  B22F3/15 ,  B22F3/14 ,  B22F2201/10

Abstract: The present invention provides methods for combining antenna diversity (10, 12) and gain control (15, 19, 17) in a communications system using a single chain of receiver characteristics. A number of input parameters related to various characteristics of a received signal are used to determine the quality of the received signal. The antenna diversity and gain control procedures are enabled or disabled based on the signal quality. The antenna diversity procedure estimates the signal level of the non-operational antenna using an infinite impulse response digital filter. The gain control procedure selects one of three gain paths based on the received signal strength.

Abstract translation: 本发明提供了在使用单一接收机特性链的通信系统中组合天线分集（10,12）和增益控制（15,19,17）的方法。 使用与接收信号的各种特性相关的多个输入参数来确定接收信号的质量。 基于信号质量启用或禁用天线分集和增益控制程序。 天线分集过程使用无限脉冲响应数字滤波器来估计非操作天线的信号电平。 增益控制程序根据接收到的信号强度选择三个增益路径中的一个。