0 3GPP2 TSG-C LTE Activities Byung K. Yi TSG-C Chair ©2005 LG Electronics, Inc. LG Electronics, Inc. grants a free, irrevocable license to 3GPP2 and its Organizational Partners to incorporate text or other copyrightable material contained in the contribution and any modifications thereof in the creation of 3GPP2 publications; to copyright and sell in Organizational Partner's name any Organizational Partner's standards publication even though it may include all or portions of this contribution; and at the Organizational Partner's sole discretion to permit others to reproduce in whole or in part such contribution or the resulting Organizational Partner's standards publication. LG Electronics, Inc. is also willing to grant licenses under such contributor copyrights to third parties on reasonable, non-discriminatory terms and conditions for purpose of practicing an Organizational Partner’s standard which incorporates this contribution. This document has been prepared by LG Electronics, Inc. to assist the development of specifications by 3GPP2. It is proposed to the Committee as a basis for discussion and is not to be construed as a binding proposal on LG Electronics, Inc.. LG Electronics, Inc. specifically reserves the right to amend or modify the material contained herein and nothing herein shall be construed as conferring or offering licenses or rights with respect to any intellectual property of LG Electronics, Inc. other than provided in the copyright statement above.

1 Kickoff Date of Evolution Ad Hoc –3GPP2 Beijing meeting, October 2005 Contributions: Four (4) in total –Two (2) Visionary Presentations –Two (2) Technical Presentations Introduction

2 Presented by TSG-C Chair New direction or reinventing the wheels by reflecting the telecommunications’ history Suggest measuring spectral efficiency in terms of “b/s/Hz/m 2” instead of “b/s/Hz” Chronicles of Important Events in Telecomm’s History

3 Presented by Lucent. Phased approaches on cdma2000 evolution Possible Approaches for Phase 2 –Backward compatible OFDMA for forward link (FL) –Coexistence of OFDMA and CDMA for reverse link (RL) –TDD enhancements to FDD –Addition of secondary pilots to support SDMA/MIMO –Enhancements for VoIP Future of cdma2000 ® cdma2000 ® is the trademark for the technical nomenclature for certain specifications and standards of the Organizational Partners (OPs) of 3GPP2. Geographically (and as of the date of publication), cdma2000 ® is a registered trademark of the Telecommunications Industry Association (TIA-USA) in the United States.

4 Presented by LGE Supports flexible operation by changing the interleaver size Gives the same performance with powerful generalized repeat accumulator low density parity check code (GRA-LDPC) Supports low density parity check code with reduced complexity and memory requirements Flexible LDPC

5 J bits in to 1 bit out Encoder and Decoder Structures for F-LDPC. Code rate is J/(J+2) Flexible LDPC (Cont’d)

PER SNR (dB) Rate 1/2 BPSK – 32/33 256QAM ~0.25 dB Packet error rate (PER) performance of F-LDPC in terms of modulation and code rates

7 Presented by LGE Proposed reduced complexity blind multiuser detection scheme for forward link (FL) based on blind multiuser signal model Only spreading sequence(s) for user(s) of interest is required Gives a comparable performance with the decorrelating detector using all information on users Blind Multiuser Detection (BMUD)

8 Blind Multiuser Detection (BMUD) (Cont’d) Proposed Blind MUD Structure

9 Blind Multiuser Detection (BMUD) (Cont’d) Group size G=3, total users K=10, blind spreading matrix size M=40, spreading gain N=64