Simulator for a GSM traffic channel transmission and reception This Simulink model simulates the entire transmission and reception of voice data of a traffic channel for GSM (TCH/FS)over a multipath FADING channel, and it calculates the BER of the received signal
標(biāo)簽： transmission Simulator reception simulates
上傳時(shí)間： 2015-07-12
上傳用戶：BIBI
對于移動通信系統(tǒng)主要有兩類衰落：大規(guī)模衰落和小規(guī)模衰落。大規(guī)模衰落表示由于大范圍內(nèi)移動而引起的平均信號能量的減少或路徑損耗。而小規(guī)模衰落則表現(xiàn)為兩種機(jī)制：信號的時(shí)延擴(kuò)展和信道的時(shí)變特性。對于無線應(yīng)用，信道的時(shí)變特性是由于發(fā)射機(jī)和接收機(jī)相對移動而造成傳輸路徑的變化。這些傳播條件的變化速率影響衰落率。如果存在大量反射路徑而不存在視行信號分量，此時(shí)的小規(guī)模衰落稱為瑞利衰落(Rayleigh FADING)，接收信號的包絡(luò)由瑞利概率分布函數(shù)統(tǒng)計(jì)描述。這種衰落也就是這次實(shí)驗(yàn)我準(zhǔn)備研究的
標(biāo)簽： 大規(guī)模 信號 模 移動通信系統(tǒng)
上傳時(shí)間： 2013-12-23
上傳用戶：gmh1314
This paper examines the asymptotic (large sample) performance of a family of non-data aided feedforward (NDA FF) nonlinear least-squares (NLS) type carrier frequency estimators for burst-mode phase shift keying (PSK) modulations transmitted through AWGN and flat Ricean-FADING channels. The asymptotic performance of these estimators is established in closed-form expression and compared with the modified Cram`er-Rao bound (MCRB). A best linear unbiased estimator (BLUE), which exhibits the lowest asymptotic variance within the family of NDA FF NLS-type estimators, is also proposed.
標(biāo)簽： performance asymptotic examines non-data
上傳時(shí)間： 2015-12-30
上傳用戶：225588
Carrier-phase synchronization can be approached in a general manner by estimating the multiplicative distortion (MD) to which a baseband received signal in an RF or coherent optical transmission system is subjected. This paper presents a unified modeling and estimation of the MD in finite-alphabet digital communication systems. A simple form of MD is the camer phase exp GO) which has to be estimated and compensated for in a coherent receiver. A more general case with FADING must, however, allow for amplitude as well as phase variations of the MD. We assume a state-variable model for the MD and generally obtain a nonlinear estimation problem with additional randomly-varying system parameters such as received signal power, frequency offset, and Doppler spread. An extended Kalman filter is then applied as a near-optimal solution to the adaptive MD and channel parameter estimation problem. Examples are given to show the use and some advantages of this scheme.
標(biāo)簽： synchronization Carrier-phase multiplicativ approached
上傳時(shí)間： 2013-11-28
上傳用戶：windwolf2000
Level Crossing Rate in Terms of the Characteristic Function: A New Approach for Calculating the FADING Rate in Diversity Systems
標(biāo)簽： Characteristic Calculating the Crossing
上傳時(shí)間： 2016-02-19
上傳用戶：shinesyh
This paper considers semiblind channel estimation and data detection for orthogonal frequency-division multiplexing (OFDM) over frequency-selective FADING channels.
標(biāo)簽： frequency-divis estimation orthogonal considers
上傳時(shí)間： 2014-12-07
上傳用戶：coeus
This program simulates the bit-error-rate (BER) performance of OSTBC with L=4 antennas over the frequency flat Rayleigh block FADING channel The code is developed for real orthogonal design, code rate 1/2 modulation- 16 QAM with gray coding resulting in 2 bits/sec/Hz.
標(biāo)簽： bit-error-rate performance simulates the
上傳時(shí)間： 2014-01-13
上傳用戶：whenfly
In this letter, the error performance of an ultra-wideband (UWB) system with a hybrid pulse amplitude and position modulation (PAPM) scheme over indoor lognormal FADING channels is analyzed. In the PAPM UWB system, input data is modulated onto both the pulse amplitudes and pulse positions.
標(biāo)簽： ultra-wideband performance amplitud letter
上傳時(shí)間： 2014-01-08
上傳用戶：yulg
There are two files in the zip folder. bpsk_spread.m and jakesmodel.m Steps for simulation: 1] Run jakesmodel.m first 2] Then run bpsk_spread.m . 3] Note that during the first run bpsk_spread.m has no rayleigh FADING.This is because the corresponding code has been commented 4] The resulting performance is stored in BER_awgn. 5] Now uncomment the Rayleigh FADING code in bpsk_spread.m file. 6] Same time comment BER_awgn (line 112) and uncomment BER_ray variable. 7] Run the simulation. To compare the perfromances of the receiver using DSSS plot the BER_awgn and BER_ray
標(biāo)簽： bpsk_spread jakesmodel simulation folder
上傳時(shí)間： 2016-05-19
上傳用戶：ynsnjs
bpsk算法程序，AWGN，FADING環(huán)境下的分析
上傳時(shí)間： 2014-12-03
上傳用戶：mikesering
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