Raw Bit Error Rate based Transport Format Resource Combination Selection for Adaptive Modulation and Coding Scheme, 3GPP HSDPA Release 7

In this thesis we demonstrate a method of system throughput enhancement for 3GPP HSDPA in Release 7, FDD (Frequency Division Duplex) with 5 MHz Downlink bandwidth. The method involves both Physical layer and Medium Access Control (MAC) sublayer aspects. This research may be extended to Evolved HSDPA or LTE.;The physical layer development presents a method of Raw Bit Error Rate (RBER) estimation in conjunction with a Wiener Chip Level Frequency Domain Equalizer (WCLFDE). The estimated RBER is utilized as an advanced Channel Quality Indicator (CQI), which also incorporates physical layer system information. Various RBER approaches are discussed for SISO, MIMO and MIMO Interference Canceler (IC) applications.;SISO RBER estimation is effected by analytically tracing the transmitted data signal as it progresses throught the multiplexing with other data bearing codes, the multipath channel, Wiener equalizer and despreader, to quantify the effective signal to interference/noise ratio (ESINR) at the output. The modulation mode and number of channelization codes are incorporated with the ESINR to estimate RBER. The ESINR takes into account white noise at the receiver, the interference between codes and self noise from different time shifts of the given user's code due to loss of orthogonality from to the multipath channel.;In the 2 × 2 MIMO system two data streams are transmitted and the two streams are mapped to the two transmit antennas via a 2 × 2 weight matrix. Since the two streams use the same set of CDMA codes, this results in some direct interference (crosstalk) between the two data streams. The signal constellations from the two data streams interfere with each other and this complicates the RBER estimation process. Treating this interference as AWGN is not sufficient for accurate RBER estimation. Thus MIMO RBER estimation should combine the crosstalk analysis and ESINR analysis. The RBER estimator for both the basic Wiener filter receiver and the Wiener filter plus interference canceler will be analyzed and compared with simulated BER measurements.;Regarding the MAC sublayer, the research demonstrates that the system throughput can be significantly enhanced by RBER estimation based Transport Format Resource Combination (TFRC) selection for Adaptive Modulation and Coding (AMC). Simulated TFRC selection results for both a baseline SINR method and the novel RBER method are presented using the gaussian channel. Their throughput performance results are also demonstrated in a simulated turbo coded transceiver using the ITU VA channel model.