Symbol Merging Approach for Intercell Interference Mitigation in Wireless OFDM Systems

Provided by: Institute of Electrical & Electronic Engineers
Topic: Mobility
Format: PDF
Out-of-band power emissions impose stringent limits on the performance that new techniques, such as InterCell Interference Coordination (ICIC) and Cognitive Radio (CR), provide over wireless systems with OFDM-based air interfaces. To tackle this problem, in this paper, the authors consider the use of a simple Symbol Merging (SM) approach, to enable the reduction of adjacent channel interference when generating the OFDM signal. The basic idea behind this proposal is simple: implement an Inverse Discrete Fourier Transform (IDFT) calculation with double length, to merge OFDM symbols in pairs and reduce by half the number of points with discontinuities in time domain (compared to a conventional OFDM transmission).

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