Performance of MIMO-OFDM-BICM on Measured Indoor Channels

In this paper, the bit error rate (BER) and packet error rate (PER) performance of multiple-input multiple-output orthogonal frequency division multiplexing with bit interleaved coded modulation (MIMO-OFDM-BICM) systems using convolutional, turbo, or low density parity check (LDPC) coding schemes are evaluated on MIMO-OFDM channels measured in various indoor environments. For a given average signal to noise ratio (SNR) per receiver, the performance of MIMO-OFDM-BICM in a line-of-sight (LoS) environment can vary significantly depending on the existence of scattering, while it is more uniformly distributed in a non-line-of-sight (NLoS) environment. We show that, due to bursty coded bit error characteristics of turbo and LDPC coding, only marginal coding gain over convolutional coding is observed in terms of BER. However, when PER is compared, a 3 dB coding gain is achieved by the turbo or LDPC code over the convolutional code