- 您现在的位置：买卖IC网 > PDF目录297615 > TPTDSCDMAWP Spatial Temporal Processing in TD-SCDMA PDF资料下载
参数资料
| 型号： | TPTDSCDMAWP |
| 英文描述： | Spatial Temporal Processing in TD-SCDMA |
| 中文描述： | 时间空间处理在TD - SCDMA |
| 文件页数： | 19/23页 |
| 文件大小： | 415K |
| 代理商： | TPTDSCDMAWP |
Spatial Temporal Processing in TD-SCDMA
Error! Reference source not found.
5
1.
Introduction
1.1.
Scope and Audience
This paper presents details of the spatial-temporal processing of a received TD-
SCDMA signal and its channel impulse response.
This document is targeted at systems engineers who are designing TD-SCDMA
systems who are interested in deploying the Motorola MRC6011 in their designs.
It is also targeted to applications engineers and marketing professions who want
to learn more about the broad range of applications of the Motorola RCF
technology.
1.2.
Executive Summary
CDMA based systems suffer from Multiple Access Interference (MAI) and it
affects all users equally. FDD based systems attempt to deal with the problem by
using detection schemes such as the rake receiver, however these schemes are
sub-optimal because they only consider one user’s signal information and do not
take into account the interference from all other users in the system.
Joint Detection algorithms on the other hand are designed to process all users in
parallel by including the interference information from the other users. In general
Joint Detection schemes are complex and computationally intensive (complexity
grows exponentially as the number of users increases) because most of the
operations are matrix and vector based operations, as the number of the users
increase, the sizes of the matrices and vectors increases and therefore the
computation power that is required to separate the users.
TD-SCDMA however, solves this problem by limiting the number of users in a
given time slot to 16, this creates a very manageable number of users that need
to be processed in parallel, furthermore these users are also synchronized.
1.3.
Background
In the year 1998 the Chinese Wireless Telecommunications Standards (CWTS,
http://www.cwts.org) put forth a proposal to the International Communications
Union (ITU) based on TDD and Synchronous CDMA technology (TD-SCDMA) for
TDD. This proposal was accepted and approved by the ITU and became part of
3GPP in March of 2001.
TD-SCDMA was incorporated as part of the TDD mode of operation in addition to
the existing TDD-CDMA mode of operation. To accommodate both modes,
3GPP now includes a “low chip rate” mode of 1.28 Mcps that corresponds to the
TD-SCDMA specifications. Because of this TD-SCDMA is sometimes referred to
as the low-chip rate mode of UTRA TDD.
Table 1-1 shows where TD-SCDMA fits in relationship to other 3GPP standards
相关PDF资料 |
PDF描述 |
|---|---|
| TPU1897 | TRANSISTOR | JFET | N-CHANNEL | 30MA I(DSS) | TO-226AA |
| TPU1898 | TRANSISTOR | JFET | N-CHANNEL | 15MA I(DSS) | TO-226AA |
| TPU1899 | TRANSISTOR | JFET | N-CHANNEL | 8MA I(DSS) | TO-226AA |
| TPU290 | TRANSISTOR | JFET | N-CHANNEL | 500MA I(DSS) | TO-92 |
| TPU291 | TRANSISTOR | JFET | N-CHANNEL | 200MA I(DSS) | TO-92 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPTELTVWCC10 | 制造商:Pass & Seymour/Legrand 功能描述:CC ABS WP 1 RJ11 JACK 1 CATV F CON |
| TPTPAMAM166 | 制造商:PERKINELMER 制造商全称:PerkinElmer Optoelectronics 功能描述:Array Module |
| TPU100B | 制造商:Bogen Communications 功能描述:Amplifier; 100 W (RMS); 70 Hz to 15 kHz 1 dB; ALC; Wall; 21 lbs. 制造商:Bogen Communications 功能描述:AMPLIFIER, TPU SERIES TELEPHONE PAGING; Leaded Process Compatible:No; Peak Reflow Compatible (260 C):No ;RoHS Compliant: No |
| TPU100B-W1 | 制造商:Black Box Corporation 功能描述:1 year warranty for TPU100B |
| TPU100B-W3 | 制造商:Black Box Corporation 功能描述:3 year warranty for TPU100B |
发布紧急采购，3分钟左右您将得到回复。