A Review Robust Frequency Synchronization in OFDM for MIMO Based Cognitive Radio Systems

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Provided by: International Journal of Electrical, Electronics and Computer Engineering (IJEECE)
Topic: Mobility
Format: PDF
The demand for high data rates in wireless communication systems is increasing as well the demand for new (communication) services. Expanding of existing services or introducing new services needs a portion in the radio spectrum. Mean while the radio spectrum is a scarce resource and is regulated by governmental regulations and policies. In cognitive radio systems, spectrum sensing plays a key role to determine the free frequency bands. However, when the primary user signals spectrum exhibits localized fading, PU detection cannot be guaranteed.
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