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We consider low latency uplink communication where users transmit their signal using generalized frequency division multiplexing (GFDM) with K subcarriers and M sub-symbols. The proposed approach for synchronization exploits both training subcarriers and training subsymbols embedded in a GFDM symbol. A frequency domain training sequence (FD-TS) of length M is loaded on each training subcarrier, and...
We derive a spherical linear interpolation (SLI) with a closed-form phase term. The derived SLI is compared with the geodesic interpolation. Simulation results show that both schemes are efficient and similar when the channels are highly correlated, since their objectives are equivalent in a sense of minimizing the distance between two adjacent codewords.
This study presents a limited feedback codebook design for a multiple-input single-output (MISO) beamforming system in a Rician fading channel. To support the Rician fading channel, the physical characteristics of the channel are exploited in designing the codebook by Grassmannian line packing (GLP). To this end, a portion of the total codewords is allocated for supporting the line-of-sight (LOS)...
In MIMO wireless communications, spatial multiplexing can be employed to achieve a high data rate. However, its performance can be degraded by spatial correlation between the transmit antennae. Hence, a simple closed-form linear precoder is proposed to improve performance when two transmit antennae are exploited at the transmitter. The proposed precoder rotates the constellation by a certain phase...
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