Back to results
US 8,274,880 B2Granted
Systems and methods for OFDM channelization
AssigneeApple Inc.
InventorsHang Zhang, Jianglei Ma, Ming Jia, Sophie Vrzic, Mo-Han Fong, Dong-Sheng Yu, Hua Xu
Life of this patent
Estimating the term…
Abstract
Systems and methods for OFDM channelization are provided that allow for the co-existence of sub-band channels and diversity channels. Methods of defining diversity sub-channels and sub-band sub-channels are provided, and systematic channel definition and labeling schemes are provided.
Claims11
A method comprising:
- transmitting OFDM symbols using a plurality of sub-carriers within an OFDM band;
- the OFDM symbols collectively containing diversity channels and sub-band channels, each diversity channel utilizing a plurality of sub-carriers distributed across the OFDM band, and each sub-band channel utilizing a contiguous set of sub-carriers within the OFDM band;
- at least some of the OFDM symbols simultaneously including sub-carriers utilized by a sub-band channel and sub-carriers utilized by a diversity channel;
- defining a slot to contain an N×M resource block space by dividing the plurality of OFDM sub-carriers into N≧2 sub-bands in frequency transmitted over M≧1 sub-slots in time, each sub-slot containing L≧1 OFDM symbol;
- and
- allocating each resource block in its entirety for one of diversity channel use or sub-band channel use.
3 more elements
A method comprising:
- transmitting OFDM symbols using a plurality of sub-carriers within an OFDM band, the OFDM symbols collectively containing diversity channels and sub-band channels, each diversity channel utilizing a plurality of sub-carriers distributed across the OFDM band, and each sub-band channel utilizing a contiguous set of sub-carriers within the OFDM band, at least some of the OFDM symbols simultaneously including sub-carriers utilized by a sub-band channel and sub-carriers utilized by a diversity channel:
- defining sub-band sub-channels using all of the plurality of OFDM sub-carriers;
- defining diversity sub-channels using all of the plurality of OFDM sub-carriers;
- assigning each sub-band channel one or more sub-band sub-channels;
- assigning each diversity sub-channel one or more diversity sub-channels;
- using a sub-band sub-channelization tree in time and/or frequency to organize sub-band sub-channels into allowable combinations for sub-band channels;
- and
- using a diversity sub-channelization tree in time and/or frequency to organize diversity sub-channels into allowable combinations for diversity channels.
5 more elements
Dependencies are inferred from the claim text.