The Effect of Timing Jitter on High-speed OFDM Systems

Performance of MC-DS-CDMA in the presence of timing jitter

“…Due to the use of a large number of subcarriers, the OFDM based MC-DS-CDMA systems are more sensitive to errors in sampling time than single-carrier systems [5,6]. Sampling time error is generally known as timing jitter and is due to the mismatch between actual sampling time and the ideal sampling time.…”

“…Timing jitter degrades performance of the MC-DS-CDMA system because it destroys orthogonality among subcarriers and results in inter-carrier interference (ICI). The effect of timing jitters on the performance of different multicarrier systems were investigated in [5][6][7][8][9]. It has been claimed in [9] that the performance degradation for the MC-DS-CDMA system caused by timing jitter is independent of the number of subcarriers, of the spreading factor, and of the spectral contents of the jitter, but only depends on the timing jitter variance.…”

“…Sampling time error is generally known as timing jitter and is due to the mismatch between actual sampling time and the ideal sampling time. Timing jitter is an inherent limitation imposed by timing recovery mechanism and analog-to-digital converters [5,6]. Timing jitter degrades performance of the MC-DS-CDMA system because it destroys orthogonality among subcarriers and results in inter-carrier interference (ICI).…”

Timing Jitter Analysis and Mitigation in Hybrid OFDM-DFMA PONs

“…Timing jitter can potentially be a significant performancelimiting factor, especially at multi-GS/s sampling speeds [15], [16]. Thus, an understanding of the trade-off between timing jitter and system performance such as receiver optical power penalty is essential for transceiver design, as it will help determine the specifications of components such as clock sources, DACs, and ADCs.…”

A Review Paper on Analysis Of I/Q Imbalance and Impact of Timing Jitter and In OFDM Transmission Systems for ICI Reduction

“…In-real there are the effects of both white and colored timing jitter, this analysis of timing jitter is more extensively presented in [6] also the introduction of timing jitters matrix to describe the rotational and inter-carrier interference (ICI) effect of timing jitter in OFDM systems is there. To reduce the ICI power due to timing jitter, applied the matrix in previous work to show that both fractional oversampling and integer oversampling can be used is explained in [7]. When a front-end component doesn't respect the orthogonality between the I and Q branch or the power balance I/Q imbalance occurs which is very well explained in [8].If the receiver having the imperfections in the analog local oscillator (LO) of the receiver may mean that the amplitudes of the local I and Q carriers are not equal and/or the phase difference is not of exactly 90 degrees causes I/Q imbalance.…”