公开(公告)号：US20040190640A1

公开(公告)日：2004-09-30

申请号：US10787700

申请日：2004-02-26

Applicant: NORTEL NETWORKS LIMITED

Inventor： Christian Dubuc ,  Colin Brown ,  Daniel Boudreau

IPC: H04K001/10

CPC classification number: H04L27/2608

Abstract: The present invention divides the available sub-carriers in an OFDM symbol window into N groups of sub-carriers wherein each group will be associated with sub-bands. In one embodiment, the sub-carriers in a group are spread throughout the range of sub-carriers to improve frequency diversity, and the sub-carriers assigned to any one group are separated by a constant offset. The sub-carriers in the group may be offset by an integer power of two. Within each group, sub-bands are defined using frequency hopping patterns among sub-carriers in the group from one OFDM symbol window to another. A pseudo-random pattern may be employed for sub-carrier mapping from one OFDM symbol window to the next to effectively distribute the sub-bands across the selected band of sub-carriers for the group.

Abstract translation: 本发明将OFDM符号窗口中的可用子载波划分为N组子载波，其中每个组将与子带相关联。 在一个实施例中，组中的子载波在整个子载波范围内扩展以改善频率分集，并且分配给任何一个组的副载波被分离一个恒定的偏移量。 组中的子载波可以被两个整数倍的偏移量。 在每个组内，使用从一个OFDM符号窗口到另一个OFDM符号窗口的组中的子载波之间的跳频模式来定义子带。 可以采用伪随机模式用于从一个OFDM符号窗口到下一个OFDM符号窗口的子载波映射，以有效地分布跨所选择的子载波频带的子带。