In this paper, we explore the influence of oversampling on a filter bank based transmultiplexer, for which previous research has established oversampling as a useful mean to ease synchronisation. The effect of oversampling is assessed mainly in terms of inter-symbol interference due to synchronisation errors and due to the residual time-dispersive effect of the transmission medium after transmultiplexing. Both effects can be targetted by a fractionally spaced equaliser. Although the achievable minimum mean square error is lower for higher oversampling ratios, we show by example of a powerline communications channel that slow convergence of least mean square type adaptive equalisers prohibits the exploitation of this benefit. Together with considerations on bandwidth efficiency and peak-to-average power ratio, it is advantageous to keep the oversampling ratio as small as possible.
|Number of pages||5|
|Publication status||Published - 23 Aug 2010|
|Event||18th European Signal Processing Conference - Aalborg, Denmark|
Duration: 23 Aug 2010 → 28 Aug 2010
|Conference||18th European Signal Processing Conference|
|Period||23/08/10 → 28/08/10|
- filter banks
- variable oversampling ratios
Weiss, S., Millar, A. P., Stewart, R., & Macleod, M. (2010). Performance of transmultiplexers based on oversampled filter banks under variable oversampling ratios. 2181-2185. Paper presented at 18th European Signal Processing Conference, Aalborg, Denmark, .