… all schemes by measuring bit error rate with 16QAM, QPSK, DQPSK and BPSK as modulation
schemes, … Following DFT block, the pilot signals are extracted and the estimated channel …

… place these pilot symbols, ie pilot pattern. … pilot pattern for PSA-OFDM system and its
performance is analyzed in terms of the BER. The proposed scheme clusters two neighboring pilots …

… The work [5] proposed a pilot design scheme based on the cross-entropy optimization … , we
send pilot signals in the frequency domain. Assume that there are P pilots which are placed at …

… , this scheme is sensitive to the signal-to-pilot power ratio (SPR). In [5], periodic pilots are …
Taking the time domain OFDM signals as complex Gaussian, we derive an ML channel …

… derive a sufficient condition for the optimal pilot pattern generated from the cyclic different …
OFDM systems, we propose three pilot design schemes to obtain a near-optimal pilot pattern…

… -OFDM systems, the channel is estimated using the observations of the pilot signals (in the
sequel we denote it by pilot … scheme is a cubic function in the number of all pilot signals being …

… the best data-pilotmultiplexed scheme in terms of minimizing data-interference on pilot
tones. This … of adjacent data tones on pilot tones, we obtain two schemes (null data insertion …

… Based on the estimated channel coefficients, we propose a signal detection scheme for
GSM-OFDM system on HSR. In our previous work [7], we have designed a pioneering …

… channel estimation schemes for conventional CDD-OFDM at the same pilot overhead … -OFDM
channel estimation are reviewed in Section III. We propose our new CDD-OFDM scheme …

… methods for OFDM systems based on comb-type pilot sub-… on combtype pilots is divided
into pilot signal estimation and … channels, the pilot-based signal correction scheme has been …