psk16_transmitter.zip - 16PSK Transmitter model in Simulink, utilizing 16 levels of gray coded bit to symbol conversion.,2010-02-01 03:40:25,下载14次
LPFPAM.zip - LPF Rectangular PAM Communication System.
Pulse-amplitude modulation is widely used in baseband transmission of digital data, with non-baseband applications having been largely superseded by pulse-code modulation, and, more recently, by pulse-position modulation ,2010-02-01 03:32:42,下载4次
sinc_pam.zip - BER Performance of Variable Width Sinc PAM with a Simple Receiver in AWGN,2010-02-01 03:29:00,下载15次
extended_reciever.zip - Bit Error Rate analysis of an Extended Receiver for Rectangular PAM.
The performance of a digital communication system in the presence of additive white Gaussian noise (AWGN) can be assessed by the measurement of the bit error rate (BER). The Simulink model provided is a rectangular polar pulse amplitude modulation (PAM) baseband system with an AWGN channel and an extended sample and hold receiver with a low pass filter.
An extended receiver has an odd number of sample and hold circuits. What remains to be answered is if such a receiver would provide a more desirable BER than that of a simple S/H receiver.,2010-02-01 03:26:22,下载33次
coherentBFSK.zip - Simulink model to verify the expected BER performance of a coherent BFSK system using the optimal threshold and proper reference frequencies for MFSK against the theoretical Pb using standard methodology. The first nulls spectral bandwidths for the BFSK signal are viewable in the spectrum scope.,2010-02-01 03:22:42,下载27次
qam8_nograycode.zip - An 8-QAM communications channel simulation in Simulink, constructed from a 16-QAM model and using an I,Q correlation receiver.
QAM (quadrature amplitude modulation) is a method of combining two amplitude-modulated (AM) signals into a single channel, thereby doubling the effective bandwidth. QAM is used with pulse amplitude modulation (PAM) in digital systems, especially in wireless applications. In a QAM signal, there are two carriers, each having the same frequency but differing in phase by 90 degrees (one quarter of a cycle, from which the term quadrature arises). One signal is called the ‘I’ signal, and the other is called the ‘Q’ signal. Mathematically, one of the signals can be represented by a sine wave, and the other by a cosine wave. The two modulated carriers are combined at the source for transmission. At the destination, the carriers are separated, the data is extracted from each, and then the data is combined into the original modulating information. ,2010-02-01 03:18:45,下载76次