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Description: wcdma的多径环境下的上下行仿真，EITS标准，written by The Mobile and Portable Radio Research Group The Bradley rtment of Electrical and Computer Engineering Virginia Polytechnic Institute and State University
Blacksburg, Virginia
-WCDMA multipath environment downstream and simulation, EITS standards, written by The Mobile and Portable Radio Research Group The Bradley Department of Electrical and Computer Engineering Virginia Polytechnic Institute and State University Blacksburg, Virginia
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Size: 481280 |
Author: 王薇 |
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Description: MC_CDMA具有良好的抗干扰和抗多径衰落过程，采用迫零检测法，进一步提高其性能，本程序已经作者仿真验证，具有良好的多用户检测功能-MC_CDMA has a good anti-jamming and anti-multipath fading process, the use of zero forcing detection to further improve its performance, the simulation procedures have been the author, has a good multi-user detection
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Size: 1024 |
Author: 卢晓雨 |
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Description: 仿真CDMA系统的信道，在输入所需用户序列和其他干扰用户序列后在信号上叠加高斯白噪声，干扰用户多径干扰和所需用户的多径干扰和衰落。并根据输入延时曲线产生信道延时，输出mul_fad_sequence为信道信号输出，max_delay为信道最大延迟，fade_sign为瑞利信道中最大幅度分量的衰落量，mpath_amp为信道多径的幅度因子-Simulation of CDMA systems channel, the import requirements of the user sequence and other interference in the signal sequence users superimposed Gaussian white noise, multipath interference interference users and required the user s multipath interference and fading. And in accordance with input delay curve generated channel delay, the output for mul_fad_sequence signal output channel, max_delay to channel the maximum delay, fade_sign Rayleigh channel for the decline of the most significant amount of weight, mpath_amp for multipath channel magnitude factor
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Size: 2048 |
Author: fisher |
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Description: Direct Blind Multiuser Detection for CDMA in
Multipath without Channel Estimation
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Size: 214016 |
Author: hesi |
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Description: 一个cdma2000的系统仿真器，附英文手册-The cdma2000-UV Simulator estimates the performance of data transmissions at the physical layer
of the mobile communications technology cdma2000 1X. These wireless data transmissions enable
the communication between mobile stations (e.g., cellular phones, PDAs, laptops) and base
stations (i.e., the communication systems that provide network access to the final user). Examples
of these transmissions include voice, e-mails, and text messages. The simulation results are
calculated according to the simulation parameters set by the user. For example, the user may set a
non-moving mobile station in an indoor environment or a moving mobile station in a vehicular
environment. With the results obtained with the simulator, the user can perform different analyses
such as the degradation in system performance due to an increase of the number of mobile stations
or the effects of multipath channels on CDMA transmissions. Also, the cdma2000-UV Simulator
assists the user in understanding the
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Size: 10449920 |
Author: han |
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Description: Basics of OFDM and CDMA. The IEEE 802.11a standard. Physical Layer Challenges. Multipath causes signal fading - constructive and destructive addition.
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Size: 15360 |
Author: Amine_z |
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Description: FIR model to use for the multipath delay.
e.g. Multi=[1 0 0 0 0.5], has the direct signal
at time 0, and a single reflection of 50 strength
of the direct signal at a delay of 4 samples.
MISC:
1. Over-Sampling: This sets the amount of oversampling of
the time waveform, so that small time errors
can be modified. Oversampling effects the multipath
time, as the multipath is applied to the- FIR model to use for the multipath delay.
e.g. Multi=[1 0 0 0 0.5], has the direct signal
at time 0, and a single reflection of 50 strength
of the direct signal at a delay of 4 samples.
MISC:
1. Over-Sampling: This sets the amount of oversampling of
the time waveform, so that small time errors
can be modified. Oversampling effects the multipath
time, as the multipath is applied to the
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Size: 3072 |
Author: 刘翔 |
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Description: This paper analyzes the
performance of an orthogonal frequencydivision
multiple access (OFDMA) scheme in
which the carriers assigned to a user are
uniformly spaced across the channel
bandwidth and code-division multiplexing is
used between them. Zero forcing and
minimum mean-square error equalization and
maximum-likelihood detection are used to
compensate for multipath fading. It is found
that code-division multiplexing recovers most
of the frequency diversity loss inherent to
OFDMA. The analyzed scheme makes it possible
to benefit from the advantages of OFDMA
and approach the performance of MC-CDMA.
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Size: 215040 |
Author: alaa |
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Description: CDMA扩频通信在多径时延展宽作用下的误码特性-CDMA spread spectrum communication in multipath time delay spread of the BER performance under
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Size: 62464 |
Author: dukeliu |
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Description: 这是一篇很好的有关信道估计的文章，
可以用来快速的了解信道估计的基本内容-and MAI induced by multiple-input, multiple-output channels. In particular, this article
reviews the typical inverse filter criteria (IFC) based algorithm, super-exponential algorithm,
and constant modulus algorithm along with their relations, performance, and improvements.
Several advanced applications of these algorithms are illustrated, including
blind channel estimation, simultaneous estimation of multiple time delays, signal-tonoise
ratio (SNR) boost by blind maximum ratio combining, blind beamforming for
source separation in multipath, and multiuser detection for direct sequence/code division
multiple access (DS/CDMA) systems in multipath.
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Size: 1144832 |
Author: renkill |
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Description: performance study high data rates modulation techniques of W-CDMA in multipath fading channel
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Size: 393216 |
Author: reddy |
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Description: IEEE TRANSACTIONS ON SIGNAL PROCESSING, VOL. 49, NO. 6, JUNE 2001, " Adaptive Minimum-BER Linear Multiuser Detection for DS-CDMA Signals in Multipath Channels Sheng Chen, Senior Member, IEEE, Ahmad K. Samingan, Bernard Mulgrew, Member, IEEE, and Lajos Hanzo"
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Size: 208896 |
Author: Kala Praveen |
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Description: DS-CDMA系统中的多用户盲检测算法在多径信道下的比较；对比LMS\RLS\KALMAN性能；代码属原创-DS-CDMA system of blind detection algorithm of many users in multipath channel of the comparison Contrast LMS \ RLS \ KALMAN performance Code of original
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Size: 1612800 |
Author: luli |
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Description: 本书内容包括随机和伪随机信号的产生伪随机信号的同步，多径和多址干扰下扩频信号的调翻和解调，编码与交织，容量、，盖及扩频多址网络的控制.
本书可供从事电信工作，特别是从事移动通信工作的技术人员和管理人员阅读.也可作为通信院校相关专业的师生的参考读物-This book includes random and pseudo-random signal generating pseudo-random signal synchronization, multipath interference and multiple access spread spectrum signal modulation and demodulation turn, coding and interleaving, capacity, cover and spread spectrum multiple access network control book available in the telecommunications work, particularly those engaged in the work of the mobile communication technology and management staff to read can also be used as the communication of relevant professional institutions and students of readings
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Size: 3771392 |
Author: cyz |
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Description: 一篇非常实用的无线通信方向的文献，是关于cdma系统中doa估计的经典-The use of antenna arrays in wireless communications
makes it possible to estimate the directions of arrival (DOAs)
of impinging waveforms. The latter can be exploited to enhance
channel estimation accuracy or as an input for advanced mobile
positioning systems. In this paper, we consider the uplink of a
multicarrier code-division multiple-access (MC-CDMA) network
in which the base station is endowed with multiple receiving antennas
arranged in a uniform linear array. Transmission takes place
over a multipath channel, and the goal is the joint estimation of
the channel responses and DOAs of the uplink signals. In doing so,
we follow a maximum-likelihood (ML) approach and assume that
users transmit orthogonal training sequences to facilitate the task
of separating the signals. This way, all unknown parameters are
estimated independently of each other with affordable complexity.
Theoretical analysis and computer simulations are used to assess
the performance of the propose
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Size: 249856 |
Author: Zhang Lin |
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Description: 这是我们做的有关CDMA 上行链路和下行链路的程序和源代码以及有关多径效应的影响相关内容-This is what we do about the CDMA uplink and downlink and source code as well as the impact of multipath effects related content
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Size: 6144 |
Author: 李洋 |
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Description: 本程序用于查看包含多径信号和直达波信号的cdma信号的模糊函数，并将其从中剔除出来-This program is used to view a cdma signal multipath signal and direct wave signal ambiguity function, and removed them the received signal
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Size: 2048 |
Author: tiger_win |
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Description: Direct sequence spread spectrum (DSSS) communication systems has been widely
used in these years for its advantage of wide spectrum, low working Signal-to-Noise
ratio (SNR), anti-interference, anti-multipath effect and capability of LPI and LPD.
They are increasingly replacing conventional communication forms and obtaining
extensively applications in modern military and commercial communication systems,
for example, CDMA communication system, GPS , measuring and control system,
satellite chain, identification of friend or foe and etc. Therefore, corresponding DSSS
electronic counter technique becomes a big problem to solve in electronic warfare
domain. DSSS electronic counter technique including blind detection, blind parameter
estimation and spreading sequences estimation. For the issue of DSSS electronic
counter technique of DSSS/QPSK signal damaged by strong additive white Gaussian
noise (AWGN), the main research content in this dissertation as follow.
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Size: 2061312 |
Author: yangs |
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Description: cdma通信系统的仿真，包括m序列产生，bpsk调制，多径信道，误码率等；-cdma system simulation, including m sequence generation, bpsk modulation, multipath and BER
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Size: 13312 |
Author: james |
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Description: ds-cdma系统仿真,考虑在多径衰落信道情况下,系统的误码率,-Ds- cdma system simulation, consider in the case of multipath fading channel, the system ber,
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Size: 3072 |
Author: rprtvm |
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