Performance of Interleave Division Multiple Access Based on Minimum Mean Square Error Detection

Abstract

Abstract-Interleave division multiple access (IDMA) recently attracted many research activities because of its excellent performance despite its reasonable low complexity. The low complexity is usually realized by the multiuser detector that applies an approximation similar to the rake receiver for CDMA systems. So far, this type of detector has been most frequently considered in IDMA literature. In this paper we investigate the performance of IDMA based on linear minimum mean square error (MMSE) detection. The MMSE detector is more complex than the rakelike approximation. At the price of the complexity, however, it is shown that the MMSE detector brings several advantages over the rake-like approach such as the superior performance on channels with spectrally poor characteristics, effective iterative processing for lower SNR values, faster convergence and therefore shorter decoding delays, and better performance for short block length. We also confirm that the complexity can be drastically reduced by the low rank approximation of the MMSE filter by its multistage representation without compromising on the performance.

Performance limits of channel parameter estimation for joint communication and positioning

“…Typically, turbo-type iterative receivers are applied for data detection in case of IDM and related techniques [24][25][26], i.e., the receiver consists of a multi-layer detector (MLD) and a bank of layer-wise decoders. At the MLD, only the multiplexing and the channel constraint are taken into account ignoring the coding constraint.…”

Factor graph based design of an OFDM-IDMA receiver performing joint data detection, channel estimation, and channel length selection

“…Extensions to MIMO-OFDM-IDMA systems with spatial multiplexing (cf. [10]) and to time-varying channels, as well as possible combination with reduced-rank approximations [11] are interesting directions for future research.…”

Triple-Polarized Multi-User Mimo-Idma System under Correlated Fading Channel

“…The importance of the IDMA system and its benefits in a MIMO system are described in [3]- [7]. A single antenna based IDMA system employing BPSK-modulation and the corresponding channel estimation is studied in [18].…”

“…In [3] [5] and [7], the iterative IDMA receiver designs have resulted in minimum mean square error and soft rake equalizers. On the other hand, these designs are limited at the receiver to a single antenna system or to the BPSK modulation scheme or to the perfect channel state information (CSI).…”