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Admin & Author: Salim

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  Website: www.salimwireless.com
  Interests: Signal Processing, Telecommunication, 5G Technology, Present & Future Wireless Technologies, Digital Signal Processing, Computer Networks, Millimeter Wave Band Channel, Web Development
  Seeking an opportunity in the Teaching or Electronics & Telecommunication domains.
  Possess M.Tech in Electronic Communication Systems.


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Popular Posts

Hybrid Beamforming | Page 2

Beamforming Techniques Hybrid Beamforming... Page 1 | Page 2 | clear all; close all; clc; Nt = 64; Nr = 16; NtRF = 4; NrRF = 4; At both the transmitter and receiver ends, there are four RF chains only for a hybrid beamforming system. Alternatively, every 16 antenna elements on the transmitter side is connected to a single RF chain, while every 4 antenna elements on the receiver side are connected to a single RF chain. Mixers, amplifiers, and other critical wireless communication components make up the RF chain. Now, in the case of hybrid beamforming, there can be four different data streams between the transmitter and receiver, as both sides have four RF chains, each of which is accountable for a separate data stream. For Analog Beamforming: All 64 Tx antenna elements create a beam or focus the resultant correlated signal spread from adjacent antennas to a particular direction. Similarly, it may be used for beam...
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Theoretical BER vs SNR for binary ASK and FSK

๐Ÿ“˜ Overview & Theory ๐Ÿงฎ MATLAB Codes ๐Ÿ“š Further Reading Theoretical Ber vs SNR for Amplitude Shift Keying (ASK) The theoretical bit error rate (BER) for binary Amplitude Shift Keying (ASK) as a function of the signal-to-noise ratio (SNR) can be derived using the following expression: If we map the binary signals to 1 and -1 in ASK , the probability of bit error will be: BER = Q(√(2*SNR))   If we map the binary signals to 0 and 1 in ASK , the probability of bit error will be:    BER = Q(√(SNR/2))   Where: Q(x) is the Q-function, which is the tail probability of the standard normal distribution. SNR is the signal-to-noise ratio. N0 is the noise power spectral density. Where Q is the Q function In mathematics Q(x) = 0.5 * erfc(x/ √ 2)   Calculate the Probability of Error using Q-function for ASK: For ASK with amplitudes 0 and 1 : When bit '0' is transmitted, the received signal is noise only . When bit '1' is transmitted, the re...
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Theoretical vs. simulated BER vs. SNR for ASK, FSK, and PSK

๐Ÿ“˜ Overview ๐Ÿงฎ Simulator for calculating BER ๐Ÿงฎ MATLAB Codes for calculating theoretical BER ๐Ÿงฎ MATLAB Codes for calculating simulated BER ๐Ÿ“š Further Reading BER vs. SNR denotes how many bits in error are received for a given signal-to-noise ratio, typically measured in dB. Common noise types in wireless systems: 1. Additive White Gaussian Noise (AWGN) 2. Rayleigh Fading AWGN adds random noise; Rayleigh fading attenuates the signal variably. A good SNR helps reduce these effects. Simulator for calculating BER vs SNR for binary ASK, FSK, and PSK Calculate BER for Binary ASK Modulation Enter SNR (dB): Calculate BER Calculate BER for Binary FSK Modulation Enter SNR (dB): Calculate BER Calculate BER for Binary PSK Modulation Enter SNR (dB): Calculate BER BER vs. SNR Curves MATLAB Code for Theoretical BER % The code is written by SalimWireless.Com clc; clear; close all; % SNR v...
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Comparisons among ASK, PSK, and FSK | And the definitions of each

๐Ÿ“˜ Comparisons among ASK, FSK, and PSK ๐Ÿงฎ Online Simulator for calculating Bandwidth of ASK, FSK, and PSK ๐Ÿงฎ MATLAB Code for BER vs. SNR Analysis of ASK, FSK, and PSK ๐Ÿ“š Further Reading ๐Ÿ“‚ View Other Topics on Comparisons among ASK, PSK, and FSK ... ๐Ÿงฎ Comparisons of Noise Sensitivity, Bandwidth, Complexity, etc. ๐Ÿงฎ MATLAB Code for Constellation Diagrams of ASK, FSK, and PSK ๐Ÿงฎ Online Simulator for ASK, FSK, and PSK Generation ๐Ÿงฎ Online Simulator for ASK, FSK, and PSK Constellation ๐Ÿงฎ Some Questions and Answers Modulation ASK, FSK & PSK Constellation MATLAB Simulink MATLAB Code Comparisons among ASK, PSK, and FSK    Comparisons among ASK, PSK, and FSK   Simulator for Calculating Bandwidth of ASK, FSK, and PSK The baud rate represents the number of symbols transmitted per second. Both baud rate and bit rate a...
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BER vs SNR for M-ary QAM, M-ary PSK, QPSK, BPSK, ...

๐Ÿ“˜ Overview of BER and SNR ๐Ÿงฎ Online Simulator for BER calculation of m-ary QAM and m-ary PSK ๐Ÿงฎ MATLAB Code for BER calculation of M-ary QAM, M-ary PSK, QPSK, BPSK, ... ๐Ÿ“š Further Reading ๐Ÿ“‚ View Other Topics on M-ary QAM, M-ary PSK, QPSK ... ๐Ÿงฎ Online Simulator for Constellation Diagram of m-ary QAM ๐Ÿงฎ Online Simulator for Constellation Diagram of m-ary PSK ๐Ÿงฎ MATLAB Code for BER calculation of ASK, FSK, and PSK ๐Ÿงฎ MATLAB Code for BER calculation of Alamouti Scheme ๐Ÿงฎ Different approaches to calculate BER vs SNR What is Bit Error Rate (BER)? The abbreviation BER stands for bit error rate, which indicates how many corrupted bits are received (after the demodulation process) compared to the total number of bits sent in a communication process. It is defined as,  In mathematics, BER = (number of bits received in error / total number of transmitted bits)  On the other hand, SNR ...
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Channel Impulse Response (CIR)

Channel Impulse Response (CIR) ๐Ÿ“˜ Overview & Theory ๐Ÿ“˜ How does the channel impulse response affect the signal? ๐Ÿงฎ Online Channel Impulse Response Simulator ๐Ÿงฎ MATLAB Codes ๐Ÿ“š Further Reading Wireless Signal Processing CIR, Doppler Shift & Gaussian Random Variable  The Channel Impulse Response (CIR) is a concept primarily used in the field of telecommunications and signal processing. It provides information about how a communication channel responds to an impulse signal.   What is the Channel Impulse Response (CIR) ? It describes the behavior of a communication channel in response to an impulse signal. In signal processing,  an impulse signal has zero amplitude at all other times and amplitude  ∞ at time 0 for the signal. Using a Dirac Delta function, we can approximate this.  ...(i) ฮด( t) now has a very intriguing characteristic. The answer is 1 when the Fourier Transform of  ฮด(...
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Coherence Bandwidth and Coherence Time

๐Ÿงฎ Coherence Bandwidth ๐Ÿงฎ Coherence Time ๐Ÿงฎ Coherence Time Calculator ๐Ÿงฎ Relationship between Coherence Time and Delay Spread ๐Ÿงฎ MATLAB Code to find Relationship between Coherence Time and delay Spread ๐Ÿ“š Further Reading   Coherence Bandwidth Coherence bandwidth is a concept in wireless communication and signal processing that relates to the frequency range over which a wireless channel remains approximately constant in terms of its characteristics. coherence bandwidth is  The inverse of Doppler spread delay time, or any spread delay time due to fading in general.  The coherence bandwidth is related to the delay spread of the channel, which is a measure of the time it takes for signals to traverse the channel. The two are related by the following formulae: Coherence bandwidth = 1/(delay spread time) Or, Coherence Bandwidth = 1/(root-mean-square delay spread time) (Coherence bandwidth in Hertz) For instance, the coherence bandwidth is...
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Gaussian minimum shift keying (GMSK)

๐Ÿ“˜ Overview & Theory ๐Ÿงฎ Simulator for GMSK ๐Ÿงฎ MSK and GMSK: Understanding the Relationship ๐Ÿงฎ MATLAB Code for GMSK ๐Ÿ“š Simulation Results for GMSK ๐Ÿ“š Further Reading Dive into the fascinating world of GMSK modulation, where continuous phase modulation and spectral efficiency come together for robust communication systems! Core Process of GMSK Modulation Phase Accumulation (Integration of Filtered Signal) After applying Gaussian filtering to the Non-Return-to-Zero (NRZ) signal, we integrate the smoothed NRZ signal over time to produce a continuous phase signal: ฮธ(t) = ∫ 0 t m filtered (ฯ„) dฯ„ This integration is crucial for avoiding abrupt phase transitions, ensuring smooth and continuous phase changes. Phase Modulation The next step involves using the phase signal to modulate a high-frequency carrier wave: s(t)...
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