Journal of Electrical and Computer Engineering Innovations (JECEI)

Communications

1. On the Design of Coherent Zero-Forcing Receiver for the Flat Fading MIMO Multiple-Access Channels

M. Sheikh-Hosseini

Volume 7, Issue 2 , Summer and Autumn 2019, , Pages 195-204

Abstract

Background and Objectives: Design of low-complexity receiver for space-time block coded (STBC) transmission over multiple-input multiple-output (MIMO) multiple-access channels has been subject of interest over the years. In this regard, zero-forcing receiver, as a low complexity receiver needing as many ... Read More Background and Objectives: Design of low-complexity receiver for space-time block coded (STBC) transmission over multiple-input multiple-output (MIMO) multiple-access channels has been subject of interest over the years. In this regard, zero-forcing receiver, as a low complexity receiver needing as many receive antennas as the numbers of users, has received increasing attention. Methods: This paper investigates multiuser detection for STBC transmission over a flat-fading MIMO multiple-access channel consisting of co-channel users each with antennas and a zero-forcing coherent receiver equipping with receiving antennas. For the cases in which , it was previously claimed that it is impossible to extend this receiver to general scenarios of orthogonal STBC transmission with and . Results: We provide a theorem allowing this extension to any scenarios satisfying the theorem condition. Describing in more details, we first prove that zero-forcing receiver of antennas can successfully extend to any STBC transmission over MIMO multiple-access systems which provides an Alamouti-like structure for the inner product of equivalent channels between different receive antennas and users. Then, in order to gain more insight, the theorem role on extending zero-forcing receiver for transmission of orthogonal STBC over MIMO multiple-access systems with and , and also to other STBC schemes like generalized coordinate interleaved orthogonal design and Quasi-orthogonal STBC is investigated in more details. Finally, the average symbol error rate of considered scenarios are numerically evaluated and compered for different STBC schemes with various numbers of and . Conclusion: Generally speaking, it is concluded that extension of zero-forcing receiver to any scenarios of OSTBC transmissions over MIMO multiple-access channels exactly depends on satisfaction of the provided theorem and this receiver can be successfully employed in all scenarios providing an Alamouti-like structure for the inner product of equivalent channels between different receiving antennas and users.

Communications

2. Interference Alignment Using Difference of Convex-based Beamformer Design for MIMO Interference Channels

N. Danesh; M. Sheikhan; B. Mahboobi

Volume 7, Issue 2 , Summer and Autumn 2019, , Pages 231-240

Abstract

Background and Objectives: To achieve signiﬁcant throughput, interference alignment (IA) is an encouraging technique for wireless interference networks. In this study, we design an aligned beamformer based on the interference leakage minimization (ILM) method to reduce the interference power for a ... Read More

Communications

3. Compact Low Pass Filter Using Sharp Roll-off Ultra-Wide Stopband T-shaped Resonator

F. Yousefi Moghadam; B. Afzali; F. Nadi; R. Zallbeygi

Volume 6, Issue 1 , Winter and Spring 2018, , Pages 25-32

Abstract

Background and Objectives: In this paper, an ultra-wide stopband microstrip low pass filter (LPF) with sharp roll-off and compact size is designed and fabricated. Also, proposed filter is designed, simulated, optimized, fabricated and measured and we can see a good agreement between the simulations and ... Read More

SECURITY

4. Cryptanalysis of R2AP an Ultralightweight Authentication Protocol for RFID

M. Safkhani

Volume 6, Issue 1 , Winter and Spring 2018, , Pages 111-118

Abstract

Background and Objectives: To overcome the security flaw of RAPP authentication protocol, Zhuang et al. proposed a novel ultralightweight RFID mutual authentication protocol, called R2AP. In this paper, we first propose a new desynchronization attack against this protocol. Methods: To extract the secret ... Read More

Journal of Electrical and Computer Engineering Innovations (JECEI)

Articles in Press

Current Issue

Volume 7 (2019)

Volume 6 (2018)

Volume 5 (2017)

Volume 4 (2016)

Volume 3 (2015)

Volume 2 (2014)

Volume 1 (2013)

Main Subjects = Communications
Number of Articles: 4

1. On the Design of Coherent Zero-Forcing Receiver for the Flat Fading MIMO Multiple-Access Channels

Abstract

2. Interference Alignment Using Difference of Convex-based Beamformer Design for MIMO Interference Channels

Abstract

3. Compact Low Pass Filter Using Sharp Roll-off Ultra-Wide Stopband T-shaped Resonator

Abstract

4. Cryptanalysis of R2AP an Ultralightweight Authentication Protocol for RFID

Abstract

Articles in Press

Current Issue

Volume 7 (2019)

Volume 6 (2018)

Volume 5 (2017)

Volume 4 (2016)

Volume 3 (2015)

Volume 2 (2014)

Volume 1 (2013)

Main Subjects = Communications Number of Articles: 4

1. On the Design of Coherent Zero-Forcing Receiver for the Flat Fading MIMO Multiple-Access Channels

Abstract

2. Interference Alignment Using Difference of Convex-based Beamformer Design for MIMO Interference Channels

Abstract

3. Compact Low Pass Filter Using Sharp Roll-off Ultra-Wide Stopband T-shaped Resonator

Abstract

4. Cryptanalysis of R2AP an Ultralightweight Authentication Protocol for RFID

Abstract

Main Subjects = Communications
Number of Articles: 4