Results 1 - 10 of 554

Differential transmission for amplifyand-forward cooperative communications

by Thanongsak Himsoon, Student Member, Weifeng Su, K. J. Ray Liu - Table of Integrals, Series, and Products , 2005
"... Abstract—In this letter, we propose a differential amplify-andforward (AF) transmission scheme for a two-user cooperative communications system. By efficiently combining signals from both direct and relay links, the proposed scheme provides superior performance compared to those of direct transmissi ..."
Abstract - Cited by 31 (3 self) - Add to MetaCart
with differential M-ary phase-shift keying (DMPSK) signals. The optimum power allocation is also determined based on the provided BER formulations. We show that the proposed differential cooperative transmission scheme together with the optimum power allocation yields comparable performance to the optimum

Asymptotic BEP and SEP of differential EGC in correlated Ricean fading and non-Gaussian noise

by Ali Nezampour, Amir Nasri, Robert Schober, Yao Ma - In GLOBECOM , 2007
"... Abstract — In this paper, we study the asymptotic behavior of the bit–error probability (BEP) and symbol–error probability (SEP) of differential M–ary phase–shift keying with differential equal gain combining (DEGC) in correlated Ricean fading and non–Gaussian noise, which in our definition also inc ..."
Abstract - Cited by 1 (0 self) - Add to MetaCart
Abstract — In this paper, we study the asymptotic behavior of the bit–error probability (BEP) and symbol–error probability (SEP) of differential M–ary phase–shift keying with differential equal gain combining (DEGC) in correlated Ricean fading and non–Gaussian noise, which in our definition also

Serial concatenation of LDPC codes and differential modulations

by Michele Franceschini, Gianluigi Ferrari, Riccardo Raheli, Aldo Curtoni, Università Di Parma - IEEE J. Sel. Areas Commun , 2005
"... In this paper, we consider serially concatenated schemes with outer novel and efficient Low Density Parity Check (LDPC) codes and inner modulations effective against channel impairments, or LDPC coded modulations. With a pragmatic approach, we show how to design LDPC codes tailored for simple and ro ..."
Abstract - Cited by 5 (1 self) - Add to MetaCart
significant insights into the impact of such distributions on the performance of the proposed concatenated schemes. The EXIT chartbased optimization is confirmed by numerical simulations, considering Differential M-ary Phase Shift Keying (DMPSK) at the transmitter side, and iterative demodulation

Decode-and-Forward Differential Modulation Scheme with Threshold-Based Decision Combining

by Thanongsak Himsoon, W. Pam Siriwongpairat, Weifeng Su, K. J. Rayliu
"... Abstract — This paper proposes a threshold-based differential decode-and-forward cooperative scheme that efficiently exploits the cooperative relay channels via the use of a pre-determined decision threshold. In the proposed scheme, the source information is forwarded by the relay only if it is corr ..."
Abstract - Cited by 2 (1 self) - Add to MetaCart
scheme is analyzed in case of differential M-ary phase shift keying signals. A tight BER approximation is established, and BER upper bound and lower bound are determined. Based on the tight BER approximation, joint optimum decision threshold and power allocation is numerically evaluated. Both analytical

“Turbo DPSK ” Using Sphere Decoding without Channel State Information

by Lutz Lampe, Volker Pauli, Robert Schober
"... Coded interleaved differential M-ary phase-shift keying (MDPSK) with iterative decoding is known as power-efficient transmission format, which is particularly suited to detection without channel state information (CSI). However, the soft-input soft-output (SISO) component decoder for DPSK is the com ..."
Abstract - Cited by 1 (0 self) - Add to MetaCart
Coded interleaved differential M-ary phase-shift keying (MDPSK) with iterative decoding is known as power-efficient transmission format, which is particularly suited to detection without channel state information (CSI). However, the soft-input soft-output (SISO) component decoder for DPSK

Turbo DPSK’ using soft multiplesymbol differential sphere decoding

by Volker Pauli, Student Member, Lutz Lampe, Robert Schober - IEEE Trans. Inf. Theory , 2006
"... Abstract — Coded interleaved differential M-ary phase-shift keying (MDPSK) with iterative decoding, so-called “Turbo DPSK”, is known as power-efficient transmission format. Due to the rotational invariance of DPSK, it particularly enables detection without channel state information (CSI). However, t ..."
Abstract - Cited by 3 (1 self) - Add to MetaCart
Abstract — Coded interleaved differential M-ary phase-shift keying (MDPSK) with iterative decoding, so-called “Turbo DPSK”, is known as power-efficient transmission format. Due to the rotational invariance of DPSK, it particularly enables detection without channel state information (CSI). However

Abstract — Capacity of M-ary Amplitude and Phase-Shift Keying

by Daniel C. Cunha, Jaime Portugheis , 2005
"... channel that also introduces an unknown carrier phase rotation is considered. The phase remains constant over a block of L symbols and it is independent from block to block. Aiming to design codes with equally probable symbols, uniformly distributed channel inputs are assumed. Based on results of Pe ..."
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of Peleg and Shamai for M-ary Phase Shift Keying (M-PSK) modulation, easily computable upper and lower bounds on the effective M-APSK capacity are derived. For moderate M and L and a broad range of Signal-to-Noise Ratios (SNR’s), the bounds come close together. As in the case of M-PSK modulation, for large

Non-Coherent Sequence Detection of M-ary PSK

by Giulio Colavolpe, Riccardo Rheli - In Proc. IEEE Int. Conf. Commun. (ICC , 1997
"... In this paper, we present new non-coherent sequence detection algorithms for M-ary phase shift keying (M-PSK) signals transmitted over additive white Gaussian noise (AWGN) channels. We first consider the problem of optimal sequence detection in the presence of an unknown channel phase modeled as sto ..."
Abstract - Cited by 4 (2 self) - Add to MetaCart
In this paper, we present new non-coherent sequence detection algorithms for M-ary phase shift keying (M-PSK) signals transmitted over additive white Gaussian noise (AWGN) channels. We first consider the problem of optimal sequence detection in the presence of an unknown channel phase modeled

Block coset codes for M-ary phase shift keying

by Frank R. Kschischang, Peter G. De Buda, Subbarayan Pasupathy, Senior Member - IEEE Journal on Selected Areas in Communications , 1989
"... Aktract-Construction of efficient block-encoded M-ary phase shift keying (M-PSK) schemes is investigated in this paper. An algebraic approach is adopted in which the basic modulation signals are associated with the elements of a finite group. Using some of the properties of group partition chains, t ..."
Abstract - Cited by 7 (1 self) - Add to MetaCart
Aktract-Construction of efficient block-encoded M-ary phase shift keying (M-PSK) schemes is investigated in this paper. An algebraic approach is adopted in which the basic modulation signals are associated with the elements of a finite group. Using some of the properties of group partition chains

Quantize-and-Forward Relaying with M-ary Phase Shift Keying

by Michael R. Souryal, Huiqing You
"... Abstract—Using cooperative transmission, two or more singleantenna users can share their antennas to achieve spatial diversity in a slow fading channel. One relaying protocol that achieves diversity, amplify-and-forward (AF), is striking in its simplicity, but prior analysis has been concerned with ..."
Abstract - Cited by 1 (0 self) - Add to MetaCart
phase shift keying (PSK) and derive the maximum likelihood-based soft-decision metric for this scheme. When each M-PSK channel symbol is quantized with q bits at the relay, simulation results show that quantizing with q =1+log 2 M bits (i.e., only one extra bit per symbol) provides comparable
Results 1 - 10 of 554