Analysis of Transmitter Phase Noise in OFDM System and its Mitigation

Phase Noise Compensation for OFDM Systems

“…Next we provide a detailed example for adapting the algorithm presented in this paper to multiuser uplink beamforming OFDM. The example assumes transmitter phase compensation [43], [44], for this reason it focuses on compensating for the receiver phase noise. Under the assumption of proper phase noise compensation at the transmitters, the phase noise at the receiver is the dominating noise compared with the compensated phase noise at the transmitters.…”

Phase Noise Pre‐correction Scheme for SC‐FDMA Signals in LTE‐Uplink

“…7, it is also noted thatφ n+P = φ 0 + φ [(n + P )T s ]. After D/A conversion, the continuous-time signal at the future time t + τ 0 can be written aŝ t+τ0) = y(t + τ 0 )e −j(φ0+φ(t+τ0)) (11) whereẑ(t + τ 0 ), y(t + τ 0 ),φ (t + τ 0 ) andφ(t + τ 0 ) are the continuous-time signals of the discrete sequencesẑ n , y n , ϕ n+P andφ [(n + P )T s ] respectively. Then the transmitted signal is given bŷ s(t + τ 0 ) = Re ẑ(t + τ 0 )e j(ωc(t+τ0)+φ(t+τ0))…”

“…The authors in Ref. [11] proposed a feedback scheme to reduce the transmitter PN. However, the large latency between the uplink and the downlink greatly degrades the performance of the scheme.…”