In this paper , a smart - antenna base receiver compatible with the w - cdma standard is researched and designed . according to this standard , the up - link frequency band allocates from 1920mhz ~ 1980mhz , and the signal is modulated by qpsk schemes 本文主要针对应用于w - cdma系统的智能天线接收机射频前端进行研究和设计，此接收机应用于w - cdma系统上行链路( 1920mhz 1980mhz ) ，采用qpsk调制技术。
Its main function is to amplify and transmit the upconvertor ' s signal . it is applied to various kinds of ground equipment and satellite transponder . there was captured by foreign brand basically in the market of mobile communications in our country 众所周知，功率放大器模块是微波通信发射机的重要组成部分，它完成对上行链路信号的放大发射功能，广泛的应用于各种地面设备和卫星转发器中。
And the pn code tracking scheme adequate for the wcdma uplink is presented and combined with the mulipath acquisition and channel estimation algorithms to complete the rake receiver scheme . computer simulations show the tracking scheme meets the requirement of wcdma uplink in 3gpp protocols and has good performance 通过大量的计算机仿真和验证，证明本论文提出的同步跟踪方案完全能达到3gpp协议对上行链路接收机的要求，具有较好的性能，同时指出进一步研究和提高的思路。
Then we conclude that the cell capacity decrease dramatically under the high bit rate service ; the interference factor of ajacent cells and the orthorgonal factor are also important parameters to influence the cell capacity ; the downlink can accept more users than uplink , so the capacity of wcdma system will be limited in uplink 从中得到结论，高数据速率的用户将会占用更多的系统资源，当数据业务增多时，小区用户数下降很快；邻近小区的干扰与正交性的优劣也是影响小区容量的重要因素；下行链路可以比上行链路容纳更多的用户，因此wcdma系统的容量将受限于上行链路。
Multipath acquisition decide the coarse pn code phase and pick up the available multipath components . following , code tracking confirm the pn code phase precisely and track every multipath component ' s delay drifting due to doppler effect . in this paper , the code tracking technique in spread spectrum communication is introduced 本论文首先介绍了在扩频通信中采用的同步跟踪技术，结合wcdma上行链路的特点，提出了适合wcdma上行链路的pn码跟踪方案，并与现有的多径搜索和信道估计算法构成完整的上行链路rake接收机方案。
Applications that could benefit from an enhanced uplink may include services like video - clips , multimedia , e - mail , gaming , ftp , video - streaming etc . this work item investigates enhancements that can be applied to wcdma in order to improve the performance on uplink dedicated transport channels Hsdpa是wcdma的r5版本中的技术特征,该技术是wcdma网络提高下行容量和数据业务速率的一种重要技术。本论文研究的hsupa技术,即高速上行链路分组接入,是wcdma系统r6版本的技术特征。
Second , the transmission and reception models of basedband cdma system based on complete complementary codes in up - and downlink are discussed and its performance in awgn channel is analyzed and evaluated through simulation . third , a receiver for multipath signal reception is investigated , which consists of two matched filters : one for channel impulse response estimation and the other for data detection 接下来，对基于完全互补码的基带cdma系统上行链路和下行链路发送与接收模型进行了讨论，分析了该系统下行链路在awgn信道中的系统性能，并对该系统上行链路和下行链路在awgn信道中进行了仿真。
