9:30, ITT-L4.1
OPEN MULTIMEDIA APPLICATION PLATFORM : ENABLING MULTIMEDIA APPLICATIONS IN THIRD GENERATION WIRELESS TERMINALS THROUGH A COMBINED RISC/DSP ARCHITECTURE
J. CHAOUI, K. CYR, S. DEGREGORIO, J. GIACALONE, J. WEBB, Y. MASSE
This paper describes how multimedia applications will be enabled in 3G wireless terminals thanks to the efficiency of the DSP core embedded in the TI Open Multimedia Application Platform (OMAP). OMAP H/W architecture will be described, with an emphasis on how multimedia applications (video, audio, speech) will benefit from this advanced architecture. The paper will also depict the advantages provided by a combined RISC/DSP architecture, compared to a single RISC architecture, for 3G multimedia mobile applications.

9:50, ITT-L4.2
A 333-MHZ DUAL-MAC DSP ARCHITECTURE FOR NEXT-GENERATION WIRELESS APPLICATIONS
R. KOLAGOTLA, J. FRIDMAN, M. HOFFMAN, W. ANDERSON, B. ALDRICH, D. WITT, M. ALLEN, R. DUNTON, L. BOOTH, JR.
We introduce the first DSP core developed at the Analog Devices and Intel Joint DSP Development Center.

10:10, ITT-L4.3
A LOW-POWER PROGRAMMABLE DSP CORE ARCHITECTURE FOR 3G MOBILE TERMINALS
T. KUMURA, D. ISHII, M. IKEKAWA, I. KURODA, M. YOSHIDA
We have developed a new-generation, general-purpose digital signal processor (DSP) core with low power dissipation for use in third-generation (3G) mobile terminals. The DSP core employs a 4-way VLIW (very long instruction word) approach, as well as a dual-multiply-accumulate (dual-MAC) architecture with good orthogonality. It is able to perform both video and speech codec for 3G wireless communications at 384 k bit/sec with a power consumption of approximately 50 mW. This paper presents an overview of both the DSP core architecture and a DSP instruction set, and it also gives some application benchmarks.

10:30, ITT-L4.4
A PROGRAMMABLE CO-PROCESSOR FOR MPEG-4 VIDEO
M. BEREKOVIC, H. STOLBERG, P. PIRSCH, H. RUNGE
M-PIRE is a programmable MPEG-4 multimedia codec VLSI for mobile and stationary applications. It integrates a RISC core, two separate DSPs, a 64-bit dual-issue VLIW macroblock engine, and an autonomous I/O processor on a single chip to cope with the high flexibility and processing demands of the MPEG-4 standard. The first M-PIRE implementation will support real-time video and audio processing of MPEG-4 simple profile or ITU H.26x standards (codec) or real-time decoding of MPEG-4 ACE-profile (CCIR, single-object). Future designs of M-PIRE will add support for object-based MPEG-4 functionalities. The paper focuses on the architecture, instruction set, and performance of M-PIRE's macroblock engine, which operates as an autonomous co-processor and carries most of the workload in MPEG-4 video processing. It has a RISC-based architecture with support for parallel processing of instructions and data. Special instructions are implemented with specific support for video processing.

10:50, ITT-L4.5
ESTIMATION OF THE VELOCITY OF MOBILE UNITS IN MICRO-CELLULAR SYSTEMS USING THE INSTANTANEOUS FREQUENCY OF THE RECEIVED SIGNALS
G. AZEMI, B. SENADJI, B. BOASHASH
Micro-cellular systems suffer from the so-called ``corner effect'' where line-of-sight between the mobile station and the base station is suddenly lost when the mobile rounds a corner. As a result, the received signal drops rapidly below threshold level and the call is lost unless short temporal window averaging is applied on the received signal. This requires an accurate estimation of the velocity of the mobile unit. Current methods for estimating the velocity of mobile units in micro-cellular systems are based on the level crossing rate (LCR) of the envelop of the received signals. This paper presents a new velocity estimator based on the instantaneous frequency of the received signal. The performance of the proposed estimator is shown to be superior to that of the LCR method. The normalised mean square error of the proposed estimator is down to below 8% whereas that of the LCR method reaches 14%.

11:10, ITT-L4.6
TRANSMIT BEAMFORMING COMBINED WITH TRANSMIT DIVERSITY FOR CDMA2000 SYSTEMS
R. SONI, R. BUEHRER, R. BENNING
With the advent of new wireless mobile internet technologies, there has been a significant increase in demand for capacity on the forward link of cellular systems. While significant enhancements to the system have improved the performance of the system, there continues to be a greater need for even more capacity on the forward link. Further capacity can only be derived by exploiting the spatial distribution of users. By intelligently steering energy related to a mobile only in the direction of a mobile, capacity can be increased. Use of intelligent antenna techniques coupled with transmit diversity techniques offer the most robust performance gains across a variety of environments. This paper discusses an antenna array architecture which exploits a combination of diversity and coherent antenna arrays to achieve peak performance in a {\em cdma2000} environment. Performance results are given for this antenna architecture under a number of fading conditions.