Abstract
Recently, offset quadrature amplitude modulation (OQAM) based filter bank multicarrier (FBMC), due to its reduced out-of-band (OOB) emission, has attracted significant research interests for replacing orthogonal frequency division multiplexing (OFDM) in future wireless communication systems. This chapter analyses and design FBMC-OQAM waveform based multiple-input multiple-output (MIMO) and multi-user massive MIMO systems. It begins by describing key features and differences of FBMC waveform over the widely popular OFDM waveform, followed by the discussion over key challenges in designing FBMC based MIMO and massive MIMO systems. A semi-blind (SB) channel state information (CSI) estimation scheme, which enhances the performance with a limited pilot overhead, is developed for MIMO-FBMC system along with its Cramer-Rao lower bound (CRLB) for benchmarking the performance. To compare the performance of FBMC and OFDM waveforms in the uplink transmission, the achievable sum-rates are derived for multi-user (MU) massive MIMO technology relying on FBMC waveform with maximum ratio combining (MRC) and zero-forcing (ZF) receivers. The corresponding power scaling laws for MU massive MIMO-FBMC are also found. It is shown that in practical impairments such as carrier frequency offset, massive MIMO-FBMC systems significantly outperform their OFDM counterparts.
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Notes
- 1.
Let the singular value decomposition (SVD) of \({\mathbf {H}}_{\bar {m}}\) be expressed as \(\text{SVD}({\mathbf {H}}_{\bar {m}})={\mathbf {S}}_{\bar {m}}\boldsymbol {\Gamma }_{\bar {m}}{\mathbf {Q}}_{\bar {m}}^{H}\). It is clear that one possible choice for \({\mathbf {W}}_{\bar {m}}={\mathbf {S}}_{\bar {m}}\boldsymbol {\Gamma }_{\bar {m}}\) and the unitary matrix can be set as \({\mathbf {Q}}_{\bar {m}}\). It implies that the whitening unitary decomposition in (3.37) is guaranteed to exist.
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Singh, P., Sharma, E. (2023). FBMC: A Waveform Candidate for Beyond 5G. In: Matin, M.A. (eds) A Glimpse Beyond 5G in Wireless Networks. Signals and Communication Technology. Springer, Cham. https://doi.org/10.1007/978-3-031-13786-0_3
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