Questions tagged [bpsk]
BPSK, a mechanism of modulation is expanded Binary Phase Shift Keying.
154 questions
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Circuit symbol timing algorithm
Sorry I am new to FPGA symbol timing recovery. Let's say I have a perfect channel (small AWGN noise is the only problem). The modulation format is BPSK, and the pulse shaping is square/rectangular ...
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GPS Receiver Tracking loops, Costas loop for BPSK
I have a few questions regarding the two tracking loops used in GPS receiver tracking. I am working on an HDL (FPGA)-based implementation of a GPS receiver and have successfully gotten acquisition to ...
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322 views
Building a DSSS reciever in GnuRadio
I have some questions regarding building a DSSS receiver in GnuRadio. Specifically with the correlation part. I'm having issues with correlating the m-sequence with the received signal. I have been ...
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1 answer
121 views
Trouble matching BER curve for simulated bit signals with theoretical BER curve using DBPSK
I'm trying to create simulate actually transmitting and receiving some bits for a binary DPSK signal (DBPSK). So generate a sine wave at a given sample rate and frequency, then for each bit I'll ...
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1 vote
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123 views
Deriving the BER equations for BPSK; justification for noise variance of $\frac{N_0}{2}$
We model White Gaussian noise (having power $\sigma^2$) as a Gaussian process $n$, whereby for every interval $(t_0,~ t_0 + L)$ the integral $\int_{t_0}^{t_0 + L}n~dt$ is a Gaussian random variable ...
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Finding Modulation Type and Transmission Power Given Link Requirements
I know that the key to choose the modulation is to find the signal to noise ratio and "cross it" with the given error probability, but I am facing some problems during the calculation of ...
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"Best" energy efficiency via capacity of uncoded BPSK AWGN
I have numerically approximated the capacity of an uncoded, binary uniform input, real AWGN BPSK channel versus the SNR using mutual information and entropy, via Gauss-hermite quadrature. My task is ...
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1 vote
1 answer
177 views
BPSK using carriers other than sinusoidal wave
I am currently a student in communications & electronics engineering undergrad working on a small project employing Direct sequence spread spectrum. For simplicity and since I am using TTL level ...
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1 answer
126 views
BPSK decoding with a non-ideal transmission medium
I'm simulating tranmission via power line communications (PLC) using BPSK. Due to the coupling circuit and slightly inductive nature of the line, the BPSK signal received is far from ideal. In the ...
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BPSK demodulation in microcontroller
I came across this example of how to decode a BPSK stream using a microcontroller. In my microcontroller of choice, (STM32) I have available a fast ADC and know the carrier frequency. Can someone ...
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1 answer
524 views
Bpsk implementation python
I found this code in a book to generate polar RZ for a bpsk modulation, if someone can explain to me how the upfirdn function is used here to generate it: Function to modulate an incoming binary ...
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Issue with small signal ML TED with low RRC excess bandwidth
I have a simple BPSK system using RRC TX & RX filters with 10% excess bandwidth with a receiver that uses a symbol synchronizer of the common type consisting of a polyphase filter bank (performing ...
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1 answer
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How to measure process gain of DSSS
I have a replicated a Direct sequence spread spectrum link (schematics taken from ARRL SS handbook) and would like to measure performance characteristics such as process gain. I have 2 questions. I ...
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1 answer
745 views
CDMA using BPSK - Demodulation
I am very much a rookie, so apologies for the terrible knowledge or misconceptions. I'm looking at this mostly in the context of GPS (or sending a signal with a very low SNR ratio). I understand BPSK ...
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118 views
In wireless communication, is pulse shaping applied to each BPSK signal before OFDM is used, or not?
I have read a number of posts that seem to ask this question but have not been able to find a definitive answer. Here goes... I understand that BPSK with NO pulse shaping would produce a signal in ...
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