Results 51 to 60 of about 5,755 (223)
Design of a Baseband Transceiver for Multicarrier CDMA Communications
EURASIP Journal on Advances in Signal Processing, 2005 Multicarrier systems have become popular for their spectral efficiency and robustness against frequency-selective fading. Multicarrier code-division multiple access (MC-CDMA) is a technique that combines the advantage of multicarrier modulation with ...
Tsai Pei-Yun +2 more
doaj +1 more source
Iteratively detected multi-carrier interleave division multiple access [PDF]
, 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
Genetic algorithm assisted Joint multiuser symbol detection and fading channel estimation for synchronous CDMA systems [PDF]
, 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
Impact of Ionospheric Scintillations on GNSS Availability and Precise Positioning
Space Weather, Volume 23, Issue 2, February 2025.Abstract For many applications where accuracy, availability, and integrity are essential, such as geodetic positioning and civil aviation, Global Navigation Satellite Systems (GNSS) are indispensable. However, GNSS signal dependability is severely hampered by ionospheric disturbances, especially equatorial plasma bubbles (EPBs), particularly in ...
C. R. Aguiar +2 more
wiley +1 more source
Decision-aided-based multiple blind PN code estimation algorithm of asynchronous CDMA signal
Tongxin 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
EURASIP 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 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]
, 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
IET 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
Contribution to Synchronization and Tracking Modelisation in a CDMA Receiver
Journal 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
Electronics 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