QPSK – IRZU INSTITUTE

discrete signals – DIgital QPSK demodulation of I/Q Data (Costas Loop, Symbol Sync, etc.)

July 16, 2024admin

I am trying to implement in hardware demodulation of QPSK-modulated I/Q samples from an SDR. The data would come from the reception of satellite transmissions. My approach is based on…Read morediscrete signals – DIgital QPSK demodulation of I/Q Data (Costas Loop, Symbol Sync, etc.)

DATA MANAGEMENT RESEARCH

In wireless communication, is pulse shaping applied to each BPSK signal before OFDM is used, or not?

December 11, 2023admin

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…Read moreIn wireless communication, is pulse shaping applied to each BPSK signal before OFDM is used, or not?

RESEARCH

qpsk – Removing fixed phase offset noise

December 5, 2023admin

This feels like a real basic question but I’m struggling to find a clear answer. I have PSK signal that subjected to a fixed phase shift noise, introduced between the…Read moreqpsk – Removing fixed phase offset noise

MQTT & IOT AUTOMATION RESEARCH

modulation – Why does NB-IoT use standard QPSK in multi-tone transmission, when pi/4 QPSK is implemented for single-tone?

September 16, 2023admin

I’ve been studying the modulation schemes used in NB-IoT communication, with a particular focus on energy efficiency. I’ve noticed that QPSK (Quadrature Phase Shift Keying) is used in multi-tone transmission,…Read moremodulation – Why does NB-IoT use standard QPSK in multi-tone transmission, when pi/4 QPSK is implemented for single-tone?

RESEARCH

Re: S-band BPSK

June 23, 2023admin

Can you share your flow diagram in the image format? ‪On Wed, Jun 21, 2023 at 8:50 PM ‫יותם זיס‬‎ <yotam.z…@gmail.com> wrote:‬ > Hi everyone, > I’m trying to convert Daniel…Read moreRe: S-band BPSK

RESEARCH

Sci-Hub | Digital coherent quadrature phase-shift-keying (QPSK). 2006 Optical Fiber Communication Conference and the National Fiber Optic Engineers Conference

March 19, 2023admin

Sci-Hub | Digital coherent quadrature phase-shift-keying (QPSK). 2006 Optical Fiber Communication Conference and the National Fiber Optic Engineers Conference | 10.1109/OFC.2006.215738 ◂ ↓ save Koc, U., Leven, A., Chen, Y.,…Read moreSci-Hub | Digital coherent quadrature phase-shift-keying (QPSK). 2006 Optical Fiber Communication Conference and the National Fiber Optic Engineers Conference

RESEARCH

M758 Datasheet catalog

February 7, 2023admin

No. Part Name Description Manufacturer 1 MSM7580 ITU-T G.721 ADPCM TRANSCODER OKI electronic components 2 MSM7580GS-K…Read moreM758 Datasheet catalog

RESEARCH

Error Performance Analysis Of Optically-preamplified Qpsk M-ary Ppm Systems Over Atmospheric Turbulent Channels

January 16, 2023admin

Fading experienced in free-space optical channels is known to impede the performance of pulse position modulation (PPM) communication systems. In this paper, we study the effects of log-normal and…Read moreError Performance Analysis Of Optically-preamplified Qpsk M-ary Ppm Systems Over Atmospheric Turbulent Channels

DATA MANAGEMENT RESEARCH

In a digital continuous-time communication system, the bit rate of NRZ data stream is 1 Mbps and carrier frequency of transmission is 100 MHz. What is the bandwidth requirement of the channel in BPSK and QPSK systems respectively?a)2 MHz and 4 MHzb)1 MHz and 2 MHzc)4 MHz and 2 MHzd)2 MHz and 1 MHzCorrect answer is option ‘D’. Can you explain this answer?

December 3, 2022admin

Question Description In a digital continuous-time communication system, the bit rate of NRZ data stream is 1 Mbps and carrier frequency of transmission is 100 MHz. What is the…Read moreIn a digital continuous-time communication system, the bit rate of NRZ data stream is 1 Mbps and carrier frequency of transmission is 100 MHz. What is the bandwidth requirement of the channel in BPSK and QPSK systems respectively?a)2 MHz and 4 MHzb)1 MHz and 2 MHzc)4 MHz and 2 MHzd)2 MHz and 1 MHzCorrect answer is option ‘D’. Can you explain this answer?

RESEARCH

Home – FlySat Satellite Chart

January 7, 2022admin

© www.flysat.com/public/index.php/en/channel/10069/iran-international Txp No SourceDate Freq PolMode SR-FEC Provider NameChannel Name System Package Encryption Comments FootPrintsEIRP(dBW) F l y S a t © Express-AM6 @ 53° E F l y…Read moreHome – FlySat Satellite Chart

RESEARCH

Novel Performance Estimation for QPSK Signals Impaired by Narrow Filtering

December 31, 2021admin

A new algorithm of error vector magnitude (EVM) for quadrature phase shift keying (QPSK) signals impaired by narrow filtering is proposed theoretically in this paper. The new algorithm can remove…Read moreNovel Performance Estimation for QPSK Signals Impaired by Narrow Filtering

DATA MANAGEMENT FFT & WAVELETS LOW VOLTAGE IC MQTT & IOT AUTOMATION

One More Long-Range, Low-Power Wireless Option Targets IoT

December 16, 2021admin

What you’ll learn: An intro to Wi-Fi HaLow. What are the IEEE 802.11ah specifications? If you have designed or are designing an Internet of Things system, you already know…Read moreOne More Long-Range, Low-Power Wireless Option Targets IoT