导频功率
- 网络Pilot Power
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文章主要介绍了WCDMA无线网络规划的关键点,包括小区呼吸效应、小区覆盖与容量相互依赖关系、导频功率分配等;
This paper emphasizes the key points of the WCDMA radio network planning including cell breathing , the relation between coverage and capacity , pilot power distribution .
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首先降低导频功率来提高系统的吞吐量,然后在一个OFDM符号内,通过迭代进行的信道估计与符号检测来提高系统的误码率。
With lower pilot power , the proposed scheme increases system throughput firstly , and then the channel estimation and symbol detection proceed iteratively within one OFDM symbol to improve the BER performance .
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CDMA前反向链路平衡问题以及导频功率的优化配置
Balance of Forward / Reverse Link and Optimization Configure of Pilot Power in CDMA
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PP-OFDM的最优导频功率分配参数应通过二维搜索得到,ZP/PP-OFDM仅有一维参数可优化。
The optimal power allocation of PP-OFDM can be found by two-dimension searching , while there is only one-dimension needed to optimize for CP / ZP-OFDM .
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仿真表明,CP/ZP/PP-OFDM分别采用各自的最优导频功率分配参数时,PP-OFDM的误码率最低,这得益于PP-OFDM更好的信道估计性能。
Simulation shows that PP-OFDM has lower Bit Error Rate than CP / ZP-OFDM because of better channel estimation performance , when CP / ZP / PP-OFDM have their own optimal pilot power allocation respectively .
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一种鲁棒的变导频功率多径信道估计方法
A Robust Varying Pilot Power Method for Multi-path Channel Estimation
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当导频功率较低时,信道估计误差较大,系统性能较差。
The estimation error will be large when the power of pilot is low .
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最后,在链路平衡的条件下,根据小区负载的情况来配置导频功率。
Finally , the pilot power is configed according to cell load on the condition of balance link .
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文中就导频功率比对系统容量及链路平衡的影响进行了探讨和研究,给出了在满足链路平衡条件下恰当的导频功率比范围。
This paper discusses the capacity and link-balance impact of pilot to powerratio , and gives an adequate pilot to powerratio percentage under link-balance condition .
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cdma1x无线子系统导频信道功率分配分析
Analysis of cdma 1x System Pilot Channel Power Assignment
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在无线通信系统中,导频信号功率分配比例对系统的性能有着重要的影响。
In the wireless communication system , the pilot power allocation strongly impacts the performance of the system .
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第三章,对跳频突发通信中的信号到达检测技术进行了讨论,分析了基于特殊导频的功率检测和相关检测两种检测方法,对其性能进行仿真,分析比较后提出了优化的方法。
Chapter three discusses the burst data detection technique . It gives the description and comparison between two different methods , the power detection and the correlation detection .
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由于公共导频信道无功率控制,有可能在接收端接收到的公共导频信号的功率很低,使得信道估计的误差变大。
Because there is no power control in CPICH , the received common pilot signal power is possibly very low if the mobile is far from the base station , and this time the channel estimates is inaccurate .
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同时,论文通过现场工程实例,重点分析了实际工程中影响网络性能的因素,并通过路测对导频污染、收发功率、载干比、拥塞情况予以优化。
Meanwhile , I also analyzed impacts towards network which emerges in a construction process by studying project cases and optimize the indexes of pilot frequency pollution Transceiver power , carrier-to-interference ratio , and jam situation via Metric Drive .
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该方法通过选择可靠的解调数据符号作为虚导频,同时对导频采用功率控制,从而提高了信道估计的质量。
In order to enhance the quality of channel estimation , we select reliably demodulated data symbols as the virtual pilots , at the same time , transmitting power control can be employed on the transmitted pilot symbols .
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在二维RAKE接收机中,通常仅用导频信道来估计信道矢量,当导频功率较低时,估计误差较大。
Channel vector is estimated only by utilizing pilot channel in 2-D RAKE receiver conventionally . The estimation error will be large when the power of pilot signal is weak . A novel algorithm of channel vector estimation is proposed in this paper .