Impact of Statistical Multiplexing on Voice Quality in Cellular Networks This paper examines the quality of transmission of voice over cellular, packetswitched networks. The medium access mechanism in the uplink is simulated under various statistical multiplexing scenarios in order to assess the effect of frontend clipping on voice quality. Moreover, the simulation is implemented in a realtime demonstration platform utilized to acquire subjective indicators of voice quality by performing Mean Opinion Score (MOS) tests. Results from the MOS tests are reported, and an analysis of the obtained speech samples is presented. Finally, the results are summarized and potential further directions for the simulation tool and the speech models are discussed.

Mobile Performance of Next Generation Japanese Terrestrial Broadcasting Research into the possibility of a next generation Japanese terrestrial broadcasting system is underway in Japan. As part of that effort, a system based on frequency division multiplexing (FDM) as used in ISDBT has been created. Multiple layers can be transmitted at the same time using different frequency divisions known as segments, such as a mobile layer and a layer for fixed reception. In this paper we report on simulations of performance of the mobile layer of this system using typical reception algorithms in a TU6 channel. We show that while a different sampling frequency has been adopted for the possible next generation system, and even with the choice of 16384 FFT, mobile reception under highway conditions can be obtained while increasing the data rate significantly.