Description: 香港城市大学李平教授提出的交织多址（IDMA），此为李平教授上传的系统仿真代码，用C++编写的。-City University of Hong Kong made by Professor Li Ping intertwined multiple access (IDMA), Professor Li Ping upload this for the system simulation code, using C++ Prepared. Platform: |
Size: 4096 |
Author:徐翼 |
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Description: 绍多带OFDM超宽带系统及其多址技术的研究论文-Research on Multiband OFDM Ultra-Wide Band System and Multiple Access Technology Platform: |
Size: 5193728 |
Author:李荣伟 |
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Description: 本论文从TH-UWB的信号结构特点出发，分析了TH-UWB系统多址干扰与
CDMA系统多址干扰的不同特点，提出了多个低复杂度的多用户检测器。-In this paper, from the TH-UWB signal structure characteristics of an analysis of TH-UWB system with multiple access interference
CDMA systems multiple access interference of the different characteristics of a number of low-complexity multi-user detector. Platform: |
Size: 1096704 |
Author:连自锋 |
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Description: 研究OFDM很好的一本书，对OFDM通信系统中的关键技术进行讨论和研究，包括OFDM的基本原理，抑制峰值平均功率比的方法，同步问题，信道估计，动态信道，比特和功率分配问题，编码调制OFDM,多址接入方法及OFDM的应用等。-Research OFDM a good book on the OFDM communication system to discuss the key technologies and research, including the basic principles of OFDM, peak-average power ratio suppression methods, synchronization, channel estimation, dynamic channel, bit and power allocation , coded modulation OFDM, multiple access methods and the application of OFDM. Platform: |
Size: 62775296 |
Author:陈娟 |
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Description: OFDMA, Orthogonal Frequency Division Multiple Access is a broad band communication method. Here channel estimation is more crucial. Based on the FFT size used for OFDM transmission method that many number of channel co-efficients are to be estimated and received signals are to be equalized using this co-efficients. Various methods trying to improve the performance and fastness are proposed. As part of master thesis various methods have be studied and evaluated using the WiMAX 802.16 system. Platform: |
Size: 2159616 |
Author:muruga |
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Description: channel estimation is single carrier frequency division multiple access also called as DFT spread OFDM. Platform: |
Size: 749568 |
Author:dude |
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Description: Beyond third generation (B3G) and fourth
generation (4G) communication systems require
bandwidth efficiency and low complexity receivers to
accommodate high data rate and large number of
users per cell. This paper provides the
recommendations for why Interleave Division Multiple
Access (IDMA) stands out among all the present day
multiple access systems. Even if IDMA is a special
case of Code Division Multiple Access (CDMA), it
simply trounces CDMA as far as the cell capacity is
concerned. In IDMA, interleavers are used as the only
means for user separation. Interleaver size can be
varied for a set of users but the recommended
interleaver size is 1024bits at which it provides better
efficiency and minimum processing delay.
Investigations carried throughout this paper are while
using 1024 bit interleavers. IDMA exhibits the
tendency to handle huge number of users. Platform: |
Size: 366592 |
Author:raghaw |
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Description: 码分多址(CDMA)技术作为第三代移动通信系统的核心技术，具有容量大、抗干扰能力强等优点。然而,传统的CDMA系统属于窄带扩频系统,它的数据速率比较低,不能胜任新一代移动通信系统
（beyond 3G）高速数据通信的需要。而多载波传输技术－正交频分复用（OFDM），作为后三代移动通信的核心技术，则具有高数据速率传输的特点。-Code Division Multiple Access (CDMA) technology as the third generation mobile communication system' s core technology, high capacity, anti-interference ability and so on. However, the traditional narrow-band CDMA system is spread spectrum system, and its relatively low data rate, can not do next-generation mobile communication systems (beyond 3G) high speed data communication needs. The multi-carrier transmission technology- orthogonal frequency division multiplexing (OFDM), after three generations of mobile communications as a core technology, the high data rate transmission characteristics. Platform: |
Size: 774144 |
Author:w |
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Description: OFDM和多址技术的结合能够允许多个用户同时共享有限的无线频谱，从而获得较高的系统容量。-OFDM and multiple access technologies combined to allow multiple users to simultaneously share the limited wireless spectrum, and thus obtain a higher system capacity. Platform: |
Size: 329728 |
Author:卓卓 |
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Description: OFDM的性能仿真，多址接入方式，可以运行，已经运行成功-Performance simulation of OFDM, multiple access methods, you can run, has been running successfully Platform: |
Size: 2048 |
Author:ama |
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Description: A noncoherent, bandwidth-efficient modulation
scheme is proposed for frequency-hopping multiple-access
(FH-MA) networks. The proposed scheme is a combination
of noncoherent -ary amplitude-shift keying (NMASK) and
orthogonal frequency-division multiplexing (OFDM). Using
this scheme will minimize the required data bandwidth. The
number of frequency slots available to the users will increase
significantly for a fixed spread-spectrum bandwidth (BW55).
The effect of the multiple-access interference will be reduced.
Simple and accurate bit error rate expressions have been derived
for FH-OFDM-MASK in additive white Gaussian noise channels
and for FH-OFDM-ASK in Rayleigh fading channels.
Index Terms—Amplitude-shift keying (ASK), frequency hopping
(FH), -ary amplitude-shift keying (MASK), noncoherent,
orthogonal frequency-division multiplexing (OFDM), Rayleigh
channels. Platform: |
Size: 420864 |
Author:tag |
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Description: To fully exploit wireless radio resource and, thus,
increase spectrum efficiency, cognitive radios shall sense wire-
less environments and identify interference to allow opportunis-
tic transmissions for secondary systems. Based on Chen et al.
in their work about a terminal architecture for cognitive radio
networks, by further obtaining transmission information with a
rate–distance nature that is extended an overlay concept,
secondary systems can even leverage busy duration of primary
systems to enhance the opportunity to use spectrum under de-
rived tolerable interference to the primary orthogonal frequency-
division multiple access (OFDMA) system.-To fully exploit wireless radio resource and, thus,
increase spectrum efficiency, cognitive radios shall sense wire-
less environments and identify interference to allow opportunis-
tic transmissions for secondary systems. Based on Chen et al.
in their work about a terminal architecture for cognitive radio
networks, by further obtaining transmission information with a
rate–distance nature that is extended an overlay concept,
secondary systems can even leverage busy duration of primary
systems to enhance the opportunity to use spectrum under de-
rived tolerable interference to the primary orthogonal frequency-
division multiple access (OFDMA) system. Platform: |
Size: 970752 |
Author:Donna Loudoe |
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Description: A Hybrid Orthogonal Frequency Division Multiplexing Interleave-Division Multiple-Access (OFDM-IDMA).
This is a simulation program for uncoded OFDM-IDMA system with QPSK modulation
and Complex channel modelled by Rayleigh fading. The program is modified based on Interleave-Division Multiple-Access (IDMA)-A Hybrid Orthogonal Frequency Division Multiplexing Interleave-Division Multiple-Access (OFDM-IDMA).
This is a simulation program for uncoded OFDM-IDMA system with QPSK modulation
and Complex channel modelled by Rayleigh fading. The program is modified based on Interleave-Division Multiple-Access (IDMA) Platform: |
Size: 56320 |
Author:widad |
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Description: LDPC编码常用的BP译码算法，以及SDMA多址中用到的BP算法的变种-MPA算法。(LDPC coding commonly used BP decoding algorithm, and SDMA multiple access used in the BP algorithm variants-MPA algorithm.) Platform: |
Size: 3072 |
Author:yason
|
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