ICI-ISI Mitigation in Cooperative SFBC-OFDM with Carrier Frequency Offset

Sreedhar, D.; Chockalingam, A.

doi:10.1109/pimrc.2007.4394652

Cited by 18 publications

(17 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the expression for the ICI at destination given by (16), the first term is caused by a CPE term at relay while the second and the third terms are due to the ICI at relay and AWGN enhanced by energy of a PN term. In the high SNR region, the first and the second terms in the above expression drastically increase causing further performance degradation due to the PN and consequently, limits the system's performance.…”

Section: Sinr Degradationmentioning

confidence: 99%

“…Implementation of ANC scheme in frequencydomain was presented in [15], and carrier frequency offset compensation is considered at relay to capture the effect of PN in ANC scheme. In [16], impact of ICI on cooperative SFBC-OFDM is theoretically analyzed and an iterative algorithm for inter-symbol interference (ISI) and ICI cancelation is proposed. It was showed that the two-step cancelation algorithm can efficiently suppress the ICI and ISI.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

On performance of analog network coding in the presence of phase noise

Ligata¹,

Gacanin²,

Adachi

2013

J Wireless Com Network

View full text Add to dashboard Cite

Analog network coding (ANC) as a simple implementation of physical layer network coding based on orthogonal frequency division multiplexing (OFDM) has been proposed to increase the network capacity and reliability of bi-directional link between a pair of users. In ANC protocol, an information between a pair of users is exchanged through two orthogonal time phases (i.e., multiple-access and broadcast phases). On the other hand, the phase noise (PN) introduces phase offset and inter carrier interference (ICI) to the useful signal. Thus, in ANC scheme PN will affect the useful signal during both multiple-access and broadcast phases. In this article, we present a performance analysis of ANC scheme using OFDM in the presence of PN in frequency-selective fading channel. We derive the total composite variance of ANC scheme in the presence of PN to obtain the signal-to-interference-plus-noise ratio (SINR) expression. Then, we evaluate the system's performance in terms of bit error rate (BER), SINR degradation, and ergodic capacity through both numerical and computer simulations. Computer simulated average BER has been consistent with the numerical results, validating the presented analysis. Our results have shown that the ANC scheme is more sensitive to the PN introduced during the broadcast phase (i.e., at destination) than during the multiple-access phase (i.e., at relay). This is because of the higher ICI to the useful signal and enhanced noise due to the imperfect self-information removal at the destination. In addition, the performance degradation of ANC scheme based on OFDM in the presence of PN is highly expressed for the PN linewidth values up to 20 Hz.

show abstract

Section: Sinr Degradationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On performance of analog network coding in the presence of phase noise

Ligata¹,

Gacanin²,

Adachi

2013

J Wireless Com Network

View full text Add to dashboard Cite

show abstract

“…S,2 and η DF S are defined in (6). Unlike the AF mode, since the interference generated in the S → R transmission is eliminated in the DF mode, the effective Signal-to-Interference-plus-Noise Ratio (SINR) in the DF mode is improved considerably, but at the cost of an additional complexity in hardware design in each relay.…”

Section: B Df Modementioning

confidence: 99%

“…A hybrid forwarding scheme for cooperative relaying in Orthogonal Frequency-Division Multiplex (OFDM)-based networks without considering the frequency offset is proposed in [5]. Both the inter-symbol-interference (ISI) and the inter-carrier-interference (ICI) mitigation in a cooperative space-frequency block coded (SFBC) OFDM by considering the frequency offset is analyzed in [6]. A spacetime cooperative OFDM (CO-OFDM) system in the presence of the frequency offset is proposed in [7], where a diversity gain comparable to that of the conventional space-time coded OFDM system can be achieved in CO-OFDM.…”

Section: Introductionmentioning

confidence: 99%

Improved OFDMA Uplink Transmission via Cooperation in the Presence of Frequency Offsets

Zhang

Tellambura

Schober

2008

IEEE GLOBECOM 2008 - 2008 IEEE Global Telecommunications Conference

View full text Add to dashboard Cite

Abstract-In this paper, we evaluate the performance improvement in an Orthogonal Frequency-Division Multiple Access (OFDMA) uplink achievable with cooperative relaying in the presence of frequency offsets. We consider both the amplifyand-forward (AF) and decode-and-forward (DF) relays. In each transmission, each node plays two roles i.e., the source node and relay, simultaneously, but at different subcarriers. The proposed scheme improves performance without sacrificing the transmission rate and power of the cooperative relays, and the total power used to transmit each symbol, including the power consumed in node the source node and the relays, is kept constant. The outage information rates of the proposed cooperative transmission scheme are derived, and the diversity gain of each forwarding mode in an interference-limited environment is analyzed in this paper. Numerical results illustrate the superior performance of the proposed scheme over the conventional transmission with regard to outage information rate.

show abstract

“…However, the effect of frequency offset, which degrades the Signalto-Interference-plus-Noise Ratio (SINR), is not considered in [3]. The effect of the frequency offset on cooperative OFDM or OFDM access (OFDMA) uplink transmission is studied in [4], [5]. The performance degradation of a cooperative OFDMA uplink due to the frequency offset is analyzed in [6].…”

Section: Introductionmentioning

confidence: 99%

Cooperative OFDM Channel Estimation with Frequency Offsets

Zhang

Tellambura

2008

IEEE GLOBECOM 2008 - 2008 IEEE Global Telecommunications Conference

View full text Add to dashboard Cite

Abstract-This paper discusses channel estimation in a cooperative orthogonal frequency-division multiplexing (OFDM) network in the presence of frequency offsets. Both the amplifyand-forward (AF) and decode-and-forward (DF) relaying modes are analyzed. In order to eliminate the multiple access interference (MAI), the maximum number of active AF and DF relays are, respectively, where N is the total number of subcarriers, L is the channel order and bac is the maximum integer part of a. The pairwise error probability (PEP) of orthogonal space-time coding in cooperative OFDM due to both the frequency offset and channel estimation errors is also evaluated. The optimal power allocation ratio between the source and the set of the relays to minimize the PEP is derived for both the relay modes. When L < 16, the DF mode always outperforms the AF mode in terms of PEP. Given 16 active relays and with L = 4, the proposed DF mode outperforms the AF mode by about 9 dB for a frequency offset error variance of 10 −3 , and this gap increases to about 11.3 dB when the variance increases to 10 −2 .

show abstract

ICI-ISI Mitigation in Cooperative SFBC-OFDM with Carrier Frequency Offset

Cited by 18 publications

References 8 publications

On performance of analog network coding in the presence of phase noise

On performance of analog network coding in the presence of phase noise

Improved OFDMA Uplink Transmission via Cooperation in the Presence of Frequency Offsets

Cooperative OFDM Channel Estimation with Frequency Offsets

Contact Info

Product

Resources

About