In order to provide high quality services, current communication systems require high‐data transmission rate and good error performance. Because single‐carrier frequency division multiple access (SC‐FDMA) is with the desirable characteristics of orthogonal frequency division multiple access and the low peak‐to‐average power ratio of single‐carrier transmission schemes, it has been adopted as the uplink transmission scheme in 3GPP long‐term evolution to approach the demand for data transmission rates and error performance. By combining multiple‐input multiple‐output (MIMO) techniques with the SC‐FDMA modulation scheme, MIMO SC‐FDMA systems can achieve high data rates over broadband wireless channels. In this paper, we propose the iterative multiuser detection scheme for the low‐density parity‐check‐coded MIMO SC‐FDMA communication systems. On the basis of the property of space‐frequency block coding, we develop the frequency domain minimum mean‐squared error and zero‐forcing equalisers with multiuser interference cancellation technique on each subcarrier to recover the transmitted symbols. Some simulation examples for uplink scenario are given to demonstrate the effectiveness of the proposed schemes. Copyright © 2014 John Wiley & Sons, Ltd.

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Orthogonal frequency‐division multiplexing is not suitable for fifth‐generation applications such as machine‐type communication, tactile internet, and internet of things. Generalized frequency‐division multiplexing (GFDM) is presented to address these requirements on the basis of the pulse‐shaping filter architecture, which makes GFDM have lower out‐of‐band emission and relatively less cyclic prefix and a become candidate for fifth‐generation systems. Because of the filter architecture, the subcarrier is nonorthogonal, which leads to serious intercarrier interference and is sensitive to carrier frequency offset (CFO). For reducing the intercarrier interference, we propose a 2‐path conjugate transmission scheme in the transmitter, and an adaptive receiver based on the modified phase rotated conjugate cancellation scheme is derived. By maximizing the carrier‐to‐interference ratio, we derive the optimal phase rotation and present an adaptive normalized block least mean squared algorithm to search the ideal result. With the proposed adaptive receiver, the CFO variation due to mismatch oscillator frequency and channel effect can be tracked effectively without feeding back the estimated information to the transmitter. In this paper, we propose a novel receiver with channel equalization and CFO compensation for multiple‐input–multiple‐output–GFDM systems in time‐varying channels. So far, no related research works exist. In the simulations, we compare the proposed receiver with several existing schemes in different time‐varying channels and modulations. The proposed scheme outperforms the existing schemes.

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