Results 51 to 60 of about 6,142 (224)

Iteratively detected multi-carrier interleave division multiple access [PDF]

open access: yes, 2007
In this paper a novel transceiver is proposed, which amalgamates the benefits of multi-carrier transmissions with those of interleave division multiple access (IDMA), leading to the concept of multi-carrier IDMA (MC-IDMA), which invokes spreading in both
Zhang, R., Hanzo, L.
core  

Phase encoding and decoding of short pulses at 10Gb/s using superstructured fiber Bragg gratings [PDF]

open access: yes, 2001
A 7-chip, 160-Gchip/s phase-shift keyed code is assigned to short pulses after reflection from a superstructured fiber Bragg grating. The code is then recognized by a second grating, which is nominally identical to the encoder grating.
Teh, P.C.   +3 more
core   +1 more source

Decision-aided-based multiple blind PN code estimation algorithm of asynchronous CDMA signal

open access: yesTongxin xuebao, 2020
Aiming at the problem of blind estimation of multi-user pseudo-code of multi-path asynchronous code division multiple access (CDMA) signal,using the finite element (FA) characteristic of transmitted symbol,a decision aid (DA) method based on maximum ...
Zhaoyang QIU, Tianyun LI, Xiangming CHEN
doaj   +2 more sources

Spreading Code Assignment Strategies for MIMO-CDMA Systems Operating in Frequency-Selective Channels

open access: yesEURASIP Journal on Wireless Communications and Networking, 2009
Code Division Multiple Access (CDMA) and multiple input multiple output- (MIMO-) CDMA systems suffer from multiple access interference (MAI) which limits the spectral efficiency of these systems.
Claude D'Amours   +1 more
doaj   +2 more sources

A Review of Performance and Reliability Issues in D Flip‐Flops for Future Artificial Intelligence and Internet of Things Applications

open access: yesIET Circuits, Devices &Systems, Volume 2025, Issue 1, 2025.
In this paper, various D flip‐flops (FFs) (DFFs) are studied and analyzed based on the performance and reliability effects of different architectures, technology, area, power, delay, and several other key performance parameters of DFFs. Based on these parameters, a few selected DFFs such as C2SFF, conditional‐bridging FF (CBFF)‐S, self‐shut‐off pulsed ...
Syeda Hurmath Juveria   +5 more
wiley   +1 more source

Genetic algorithm assisted Joint multiuser symbol detection and fading channel estimation for synchronous CDMA systems [PDF]

open access: yes, 2001
A novel multiuser code division multiple access (CDMA) receiver based on genetic algorithms is considered, which jointly estimates the transmitted symbols and fading channel coefficients of all the users.
Hanzo, L., Yen, K.
core   +1 more source

Contribution to Synchronization and Tracking Modelisation in a CDMA Receiver

open access: yesJournal of Engineering, 2013
We propose and analyze a noncoherent receiver with PN code tracking for direct sequence code division multiple access (DS-CDMA) communication systems. We employ the delay-lock loop (DLL) architectures for the tracking stage.
Aicha Alami Hassani   +2 more
doaj   +1 more source

DDMA Signal Separation Method Based on Frame‐Interleaved Binary Mask

open access: yesElectronics Letters, Volume 61, Issue 1, January/December 2025.
To solve the problem of multi‐target separation failure at the same distance in empty‐band Doppler division multiple access system, we propose the frame‐interleaved binary mask method. This method can effectively separate multiple targets in above scenario. ABSTRACT Millimetre‐wave multiple‐input multiple‐output (MIMO) radar has many advantages such as
Lu Qian   +3 more
wiley   +1 more source

A comparative study of the performance of seven- and 63-chip optical code-division multiple-access encoders and decoders based on superstructured fiber Bragg gratings [PDF]

open access: yes, 2001
We report a range of elementary optical coding and decoding experiments employing superstructured fiber Bragg grating (SSFBG) components: first, we perform a comparative study of the relative merits of bipolar and unipolar coding: decoding schemes and ...
Teh, Peh Chiong   +3 more
core   +1 more source

General Signal Model for Multiple-Input Multiple-Output GMTI Radar

open access: yesSensors, 2018
Multiple-input multiple-output (MIMO) ground moving target indication (GMTI) radar has been studied recently because of its excellent performance. In this paper, a general signal model is established for the MIMO GMTI radar with both fast-time and slow ...
Fuyou Li   +4 more
doaj   +1 more source

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