BER Analysis of OFDM Systems Impaired by DC Offset and Carrier Frequency Offset in Multipath Fading Channels

Yih, Chi-Hsiao

doi:10.1109/lcomm.2007.070895

Cited by 15 publications

(9 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In a high OSNR condition, there were two humps on the sides of the zero CFO, which may come from DC offset. DC offset could affect the BER in the presence of CFO [18] and the residual DC offset after compensation could deteriorate the subcarrier which was shifted to DC due to CFO.…”

Section: Experimental Results In the Absence Of Cfomentioning

confidence: 99%

Simple full-range carrier frequency offset estimation for high speed CO-OFDM

Rha¹,

Youn²,

Nam³

et al. 2013

Opt. Express

View full text Add to dashboard Cite

We propose a simple, full-range carrier frequency offset (CFO) algorithm for coherent optical orthogonal frequency division multiplexing (CO-OFDM) systems. By applying the Chinese remainder theorem (CRT) to training symbol of single frequency, the proposed CFO algorithm has wide range with shorter training symbol. We numerically and experimentally demonstrate the performance of CRT-based algorithms in a 16-ary quadrature amplitude modulation (QAM) CO-OFDM system. The results show that the estimation range of the CRT-based algorithm is full-range corresponding to the sampling frequency. Also, the bit error ratio (BER) degradation of the proposed algorithm with one training symbol is negligible. These results indicate that the proposed algorithm can be used as a wide range CFO estimator with an increased data rate in high speed CO-OFDM systems.

show abstract

Section: Experimental Results In the Absence Of Cfomentioning

confidence: 99%

Simple full-range carrier frequency offset estimation for high speed CO-OFDM

Rha¹,

Youn²,

Nam³

et al. 2013

Opt. Express

View full text Add to dashboard Cite

show abstract

“…The first objective of this paper is to analytically determine the dependency of symbol error rate (SER) on the CFO and dc offset for OFDM systems in multipath Rayleigh fading channels. We extend our previous work [18] to high-order modulation with both the transmitter and the receiver dc offsets. The second objective of this paper is to design and analyze a dc offset compensation method to mitigate the detrimental effect of dc offset on system performance.…”

mentioning

confidence: 82%

Analysis and Compensation of DC Offset in OFDM Systems Over Frequency-Selective Rayleigh Fading Channels

Yih

2009

IEEE Trans. Veh. Technol.

View full text Add to dashboard Cite

Abstract-Direct-conversion receivers have become popular in radio-frequency (RF) circuit design for their advantages of low cost, low power consumption, and fewer chip components over other architectures such as heterodyne receivers. However, the direct-conversion receiver architecture often suffers from direct current (dc) offset, which is a consequence of the imperfect direct-conversion process. In this paper, we study the effects of dc offset on the symbol error rate (SER) performance of orthogonal frequency-division multiplexing (OFDM) systems in multipath Rayleigh fading channels. Since OFDM system performance is sensitive to carrier frequency offset (CFO), the CFO must be estimated and compensated at the receiver. Due to CFO compensation, the dc offset caused by direct-conversion receivers and/or mixed-signal circuits no longer only affects the dc subcarrier and is spread over all subcarriers. By deriving the analytical SER formulas for OFDM systems with various modulation formats, the dependency of SER on dc offset and CFO is clearly quantified. These SER formulas can help system designers determine suitable specifications of RF components and understand whether digital dc offset compensation is necessary or not. Finally, we propose and analyze a simple dc offset estimation and cancellation scheme under the assumption that dc offset holds constant in one OFDM symbol duration. Numerical results demonstrate the effectiveness of the proposed dc offset-cancellation scheme.Index Terms-Carrier frequency offset (CFO), direct current (dc) offset, interference cancellation, orthogonal frequencydivision multiplexing (OFDM), performance analysis, Rayleigh fading, symbol error rate (SER).

show abstract

“…The BER is calculated for OFDM as in [97], [98] and for FBMC according to [67] based on one tap ZF equalization, which eliminates self-interference but introduces noise that depends on the choice of PF. The theoretical BER for OFDM has been plotted as a benchmark to prove the validity of the BER curves [97], [98].…”

Section: E Bit-error-rate Performance Over Various Channelsmentioning

confidence: 99%

Evaluation and Analysis of FBMC/OQAM Systems Based on Pulse Shaping Filters

2020

View full text Add to dashboard Cite

Cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) is the most widespread multicarrier modulation scheme. However, the use of a rectangular filter in CP-OFDM causes poor outof-band (OoB) radiation. Moreover, the CP causes spectral efficiency loss. To overcome these limitations, a filter bank multicarrier (FBMC) was proposed which uses prototype pulse shaping filters that can be adapted to fulfil the system requirements. The choice of the filter is crucial for FBMC/offset quadrature amplitude modulation (OQAM) due to its significant impact on the achieved performance. In this paper, new prototype pulse shaping filters in FBMC/OQAM systems are proposed, aiming to improve the system performance. A number of prototype pulse shaping filters, such as raised cosine pulse (RC), root raised cosine pulse (RRC), better than raised cosine pulse (BTRC), modified Bartlett-Hanning (MBH), improved sinc power pulse (ISP), phase modified sinc pulse (PMSP), parametric linear pulse (PLP), linear combination pulse (LCP), PHYDYAS and Hermite, are considered. The performance of each pulse shaping filter in FBMC/OQAM is evaluated and compared other in terms of the power spectral density (PSD), spectral efficiency, signal-to-interference ratio (SIR), time offset (TO), carrier frequency offset (CFO) and bit error rate (BER) performance over various channels. In addition, as multiple input multiple output (MIMO) is one of the main challenges associated with FBMC, we propose the new approach that use the frequency/time block spreading based on a Walsh-Hadamard (WH) code in MIMO FBMC/OQAM and investigate the combination of the our proposed prototype pulse shaping filters with MIMO systems. The proposed filters are shown to be suitable candidates for FBMC/OQAM systems.

show abstract

BER Analysis of OFDM Systems Impaired by DC Offset and Carrier Frequency Offset in Multipath Fading Channels

Cited by 15 publications

References 4 publications

Simple full-range carrier frequency offset estimation for high speed CO-OFDM

Simple full-range carrier frequency offset estimation for high speed CO-OFDM

Analysis and Compensation of DC Offset in OFDM Systems Over Frequency-Selective Rayleigh Fading Channels

Evaluation and Analysis of FBMC/OQAM Systems Based on Pulse Shaping Filters

Contact Info

Product

Resources

About