In the up link of wcdma the spread factor ranges from 4 - 256 and ranges from 4 - 512 in the down link of wcdma 上行链路中扩频因子变化范围为4 - 256 。下行链路中，扩频因子的变化范围是4 - 512 。
The purpose of this paper is studying the hardware implementation method of ofdm , frame and various interfaces using fpga 本论文的设计重点在b3gtdd方式下行链路的发送端? ? ofdm调制、组帧以及各种接口的fpga实现。
Uestc is in charge of the downlink of the b3g project that bases on fpga . the system needs a tool to debug the logic in fpga 在b3g项目(国家“ 863 ” future计划)中,电子科技大学负责下行链路设计,主要是基于现场可编程门阵列( fpga )进行开发。
The purpose of this paper is studying the hardware implementation method of the coder of ldpc code , interleaver and various interfaces using fpga 本论文的设计重点在于b3gtdd方式下行链路的发送端? ? ldpc编码器、交织器以及各种接口的fpga实现。
Next , a two - level spreading - despreading scheme is proposed , and the go sequences are applied to the forward link of a multi - cell cdma system in this thesis 接着，本文提出了一种两级扩频方案并探讨了广义正交序列在多小区cdma蜂窝系统下行链路中的应用。
In the end , a simulation processing experiment regarding channel coding , multiplexing , decoding and demultiplexing for downlink of wcdma is implemented using matlab simulink toolbox 最后,采用matlab的simulink工具箱对wcdma下行链路的整个处理流程进行了仿真。
Uestc is in charge of the tdd downlink that bases on fpga . ofdm ( orthogonal frequency division multiplex ) is the key technology of b3g system 现在已经进入项目的第二个阶段,电子科技大学负责b3gtdd方式的下行链路设计,重点是基于fpga (现场可编程门阵列)的实现研究。
In the second one , a new algorithm of downlink beamforming is presented in this thesis because of some bottlenecks existing in smart antennas when applied in downlink 另一方面，由于在fdd系统中智能天线应用于下行链路存在一些瓶颈，本文提出一种新的智能天线下行波束形成方法。
Hence , in the downlink of distributed mimo systems , the transmit signals from different transmit antennas experience different channel propagation delays to arrive in the mobile station 因此在分布mimo的下行链路中,从不同发射天线发射的信号到达移动台所经历的信道传播时延也不相同。
We study the assignment of ovsf code in the downlink of wcdmajn order to assure the real time traffic , the dynamic allocation method based on priority is proposed and simulated 本文重点研究了扩频码( ovsf )在wcdma下行链路中的分配策略，提出了基于优先级考虑的分配策略，并进行了仿真。
