发明名称 |
CODE ASSIGNMENT IN A CDMA WIRELESS SYSTEM |
摘要 |
<p>A CDMA wireless communication system for communicating with wireless terminals. The system comprises a channel estimator for determining characteristics of the wireless channels of the wireless terminals. The channel characteristics are used by a code optimizer to assign spreading codes to the wireless terminals. In one embodiment, the code optimizer utilizes an iterative code optimization algorithm and maintains a processing set of wireless terminals. The code optimizer chooses target wireless terminals and performs a random code search in order to find an improved code for the target wireless terminal. The improved code found in the random code search is further improved by performing a gradient search of codes in the signal space in the vicinity of the improved code and by performing a gradient search of transmission delays. The improved codes are transmitted to the wireless terminals for use in reverse link communication.</p> |
申请公布号 |
CA2310175(A1) |
申请公布日期 |
2000.12.04 |
申请号 |
CA20002310175 |
申请日期 |
2000.05.29 |
申请人 |
LUCENT TECHNOLOGIES INC. |
发明人 |
PAPADIAS, CONSTANTINOS BASIL;FOSCHINI, GERARD JOSEPH;CHEN, JIUNN-TSAIR |
分类号 |
H04J13/04;H04B7/26;H04J13/00;H04J13/02;H04Q7/34;(IPC1-7):H04B1/69;H04Q7/36 |
主分类号 |
H04J13/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|