Pilot and Cluster Allocation in Downlink PUSC … Reply to Comment #436, #494, #501, #503

2004-07-08 IEEE C802.16e-04/239 Project IEEE 802.16 Broadband Wireless Access Working Group Title Pilot and Cluster Allocation in Downlink PUSC – Reply to Comment #436, #494, #501, #503 Date 2004 -07-08 Submitted Source(s) Ran Yaniv Voice: +972-37674583 mailto: ran.yaniv@alvarion.com Tal Kaitz Voice: +972-36456273 Naftali Chayat mailto: tal.kaitz@alvarion.com Vladimir Yanover Marianna Goldhammer All with Alvarion Ltd. 21 A Habarzel St. Ramat - Hahayal Tel - Aviv 69710 Re: Two fundamental problems exist in the downlink PUSC scheme as it is currently Abstract defined. The first is related to the allocation of subchannel data subcarriers into clusters; the second fundamental issue is related to the pilot spacing in STC mode – Pilot-aided channel estimation will fail in a mobile environment with the current spacing. A detailed performance evaluation is presented along with a proposed solution. Purpose Proposal for modifications to the structure of the PUSC scheme in OFDMA mode. This document has been prepared to assist IEEE 802.16. It is offered as a basis for discussion and is not binding on Notice the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained ...