Description: GSM有关的基础知识.诸如,数字移动通信GSM发展简史技术,GSM系统结构及相关接口,TDMA帧结构,GSM的区域定义及GSM识别号,无线接口的逻辑信道及系统消息,GSM系统的移动性管理和安全性管理以及GSM移动网络结构和信令网等-GSM on the basis of knowledge. Such as, digital GSM mobile communications technology development history, GSM system architecture and related interfaces, TDMA frame structure, GSM regional definition and GSM identification numbers, the logical channel radio interface and system messages, GSM System for Mobile management and security management, and GSM mobile network architecture and signaling networks Platform: |
Size: 1138688 |
Author:张石秀 |
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Description: 基于随机选择的返回式动态树形反碰撞算法在解决射频识别系统中碰撞问题时，通过随机选择碰撞位来影响返回式动态树的分支，
让尽可能多的只有一位碰撞的一对标签被同时识别，从而提高识别效率，同时通过减少阅读器检测标签时发送给标签的参数，来提高信道利用率。基于该算法的标签设计逻辑简单，为射频识别技术的推广起到了推动作用。-Randomly selected based on the return Dynamic Tree Anti-collision algorithm to solve the problem of collisions of radio frequency identification system, through the random selection to influence the return-type collision-bit dynamic tree branches, so that as much as possible, only a collision of a pair of labels have been At the same time to identify, to improve recognition efficiency and by reducing the detection of label reader sent to the label parameters to improve channel utilization. Algorithm based on the logic of a simple label design for the promotion of radio frequency identification technology has played a role in promoting. Platform: |
Size: 171008 |
Author:吴晓彦 |
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Description: 自动识别系统电台的卞要功能是在接收状态将接收到的射频信号解调成高斯最小频移键控(GMSI})比特流以供信号处理板使用 而在发射状态则将来自处理板的9.6 kbps的GMSI}比特流调制成适合发射的射频信号并发射。木电台使用半双工方式工作，共用一副大线，其中发射通路只有一个通道，但可通过微处理器改变调制芯片LMX1501的内部设置数以产生两个频率，然后再经过卜变频得到中心频率分别为162.025 MHz和161.975 MHz的发射信号 木电台的接收则分为二路，其解调芯片都是用TA31136来实现的，其中两路用来接收中心频率分别为162.025 MHz和161.975 MHz信号，另一路用来接收数字呼n}}信号，中心频率为156.025 MHz。二个通路的结构、工作原理和使用的器件都基木相同。
-Bian automatic identification system stations to function in the receiving state will receive the RF signal demodulation into a Gaussian Minimum Shift Keying (GMSI)) bit stream for the signal processing board used while the state will launch from the processing board The GMSI) of 9.6 kbps bit stream into a modulated RF signals suitable for launch and launch. Wood work station using the half-duplex mode, sharing one big line, which launched only one channel path, but can be modulated by changing the microprocessor chip LMX1501 number of internal settings to produce two frequencies, and then get through the BU center frequency of inverter for 162.025 MHz and 161.975 MHz transmit signal wooden radio receiver is split Road, its demodulator chips are used to achieve TA31136, in which two-way center frequencies were used to receive 162.025 MHz and 161.975 MHz signal, the other all the way to receive digital calls n)) signal, the center frequency of 156.025 MHz. 2 channel structure, working Platform: |
Size: 12288 |
Author:王军 |
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Description: 对现代移动通信技术进行概括。
第一章 无线信道
第二章 分集接收与最佳接收
第三章 扩频信号
第四章 信道辨识与均衡
第五章 多用户检测
第六章 阵列信号处理
第七章 通信中的自适应阵列处理
第八章 CDMA系统的信号处理-Modern mobile communications technology to generalize. Chapter I Chapter II radio channel with diversity reception and the best spread-spectrum signals received Chapter IV channel identification and equalization Chapter V Chapter VI Multi-User Detection of Chapter VII of communication array signal processing adaptive array processing in Chapter VIII CDMA system, signal processing Platform: |
Size: 3697664 |
Author:董清 |
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Description: The problem of channel equalization via channel
identification (CEQCID) that has previously been considered by a
handful of researchers is explored further. An efficient algorithm
for mapping the channel parameters to the equalizers coeficients
is proposed. The proposed scheme is compared with a lattice
least squares (LS) based receivers. For the particular application
of the high frequency (HF) radio channels, we find that the
CEQCID has lower computational complexity. In terms of the
tracking performance, also, the CEQCID has been found to be
superior to the LS based receivers [4]. We emphasize on the
implementation of a fractionally tap-spaced decision feedback
equalizer (DFE) and compare that with the T-spaced DFE of
[4]. We show that the former is a better choice for the multipath
HF channel-The problem of channel equalization via channel
identification (CEQCID) that has previously been considered by a
handful of researchers is explored further. An efficient algorithm
for mapping the channel parameters to the equalizers coeficients
is proposed. The proposed scheme is compared with a lattice
least squares (LS) based receivers. For the particular application
of the high frequency (HF) radio channels, we find that the
CEQCID has lower computational complexity. In terms of the
tracking performance, also, the CEQCID has been found to be
superior to the LS based receivers [4]. We emphasize on the
implementation of a fractionally tap-spaced decision feedback
equalizer (DFE) and compare that with the T-spaced DFE of
[4]. We show that the former is a better choice for the multipath
HF channel Platform: |
Size: 420864 |
Author:hamed |
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Description: UHF MIMO-RFID在Nakagami衰落信道下的性能分析-the reverse-link interrogation range
(RIR) of ultrahigh-frequency-band passive radio-frequency identification
(RFID) is analyzed for single-input and single-output
(SISO) and multiple-input and multiple-output (MIMO) systems
with maximal-ratio combining in the pinhole channel, where each
channel is modeled as an arbitrarily correlated Nakagami-m
distribution. Platform: |
Size: 365568 |
Author:小红 |
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Search - IDENTIFICATION OF RADIO CHANNEL