Multiantenna Analog Network Coding for Multihop Wireless Networks
Subchannelization procedure for bidirectional communication using the IEEE 802.16e protocol. In uplink, each user is allocated slots spanning subchannels in frequency over slot-durations. Each slot-duration comprises 3 consecutive OFDM symbols, whereas each subchannel contains 6 tiles distributed throughout of the useful frequency band. A tile contains 4 subcarries over a slot-duration with the 4 pilots at the corners of the tile and the remaining 8 tones used for data. In the above figure, there are tiles with , , and . The circles filled with violet and red colors indicate the pilot tones of users 1 and 2, respectively, whereas the circles filled with black and blue colors indicate the data tones of users 1 and 2, respectively.
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