This paper describes a nonorthogonal multiple access (NOMA)-based device-to-device
(D2D) communication system underlaying in a cellular network sharing time and frequency …

This chapter considers coexistence between the nonorthogonal multiplexing access
(NOMA) device‐to‐device (D2D) downlink system and the uplink cellular system extending …

Massive multiple-input, multiple-output (M-MIMO) is an important knowledge for fifth-
generation (5G) wireless cellular networks. The pilot contamination (PC) is an issue in …

Pilot contamination is one of the main impairments in multi-cell massive Multiple-Input
Multiple-Output systems. In order to improve the channel estimation in this context, we …

MIMO wireless communication systems with channel state estimation, in which 2 to 4
transmit-receive antenna pairs are employed, are simulated. The channel estimation is …

Background. For multiplying the capacity of a radio link by using multiple antennas at the
transmitter and receiver ends, wireless communication networks use the MIMO technique …

ABSTRACT A 2× 2 MIMO wireless communication system with channel estimation is
simulated, in which two transmit, and two receive antennas are employed. The orthogonal …

The Doppler effect in 2× 2, 3× 3, and 4× 4 MIMO wireless communication systems with
channel state estimation is studied. The orthogonal pilot signal approach is used for the …