Prototyping and performance evaluation of TDD-based 2×2 MIMO-OFDM transceiver

Abstract

We have been developing a new wireless link that enables quick transmission of file-based video resources for news programmes. Since the transmission distance we assume ranges widely from less than 1 km to as far as 50 km, it is necessary to have efficient transmission timing control in duplex communication based on TDD. In order to enhance the transmission capacity in line-of-sight environments, it is useful to introduce a MIMO technique that exploits dualpolarized antennas and a multilevel modulation scheme such as 128 QAM and 256 QAM. In this paper, we describe the prototype TDD-based 2×2 MIMO-OFDM transceiver and its performance evaluation in wired and radio transmission experiments.

PCI reduction method suitable for type-II HARQ with SR-ARQ

“…In this section, we evaluate the proposed PCI reduction method for estimating PCI information at the block error rate (BLER) and compare the data throughput versus carrier to noise ratio (CNR) in an additive white Gaussian noise (AWGN) environment using the parameters of a bidirectional FPU we have been developing [1]. Table I lists the specifications of the bidirectional FPU.…”

“…To deliver these high quality materials from a relay site to a broadcast station in a short time, reliable and highspeed wireless transmission devices are required. To achieve this goal, we are developing microwave link devices called bidirectional field pickup units (FPUs) [1], which use a hybrid automatic repeat request (HARQ) scheme that achieves higher reliability and throughput than devices using either forward error correction (FEC) or automatic repeat request (ARQ).…”