OFDM TRANSMITTER AND OFDM RECEIVER
PROBLEM TO BE SOLVED: To provide an OFDM transmitter and an OFDM receiver, capable of coping with a delay wave greater than a GI length, without degrading resistance against speed at mobile reception when performing hierarchical transmission of services for both fixed reception and mobile reception...
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Main Authors | , , , , , , , , , |
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Format | Patent |
Language | English Japanese |
Published |
30.03.2017
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Subjects | |
Online Access | Get full text |
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Summary: | PROBLEM TO BE SOLVED: To provide an OFDM transmitter and an OFDM receiver, capable of coping with a delay wave greater than a GI length, without degrading resistance against speed at mobile reception when performing hierarchical transmission of services for both fixed reception and mobile reception by one system, in a radio communication system such as a broadcasting system.SOLUTION: A segment configuration part 41 for fixed reception of a frame configuration circuit 13 generates a segment for fixed reception, for example, by disposing a pilot signal with every 12 carriers in a frequency direction and every 4 symbols in a time direction as one cycle, according to a preset pattern, for the segment for fixed reception. A segment configuration 42 for mobile reception part generates a segment for mobile reception, for example, by disposing a pilot signal with every three carriers in a frequency direction and every one symbol in a time direction as one cycle, according to a preset pattern, for the segment for mobile reception. A combining part 45 generates a transmission frame by combining the segment for fixed reception with the segment for mobile reception.SELECTED DRAWING: Figure 3
【課題】放送システム等の無線通信システムにおいて、固定受信用及び移動受信用のサービスを1つのシステムで階層伝送する際の移動受信にて、速度に対する耐性を劣化させることなく、GI長以上の遅延波にも対応する。【解決手段】フレーム構成回路13の固定受信用セグメント構成部41は、固定受信用セグメントについて、予め設定されたパターンに従って、例えばパイロット信号を、周波数方向の12キャリア毎かつ時間方向の4シンボル毎を1周期として配置し、固定受信用セグメントを生成する。移動受信用セグメント構成部42は、移動受信用セグメントについて、予め設定されたパターンに従って、例えばパイロット信号を、周波数方向の3キャリア毎かつ時間方向の1シンボル毎を1周期として配置し、移動受信用セグメントを生成する。結合部45は、固定受信用セグメント及び移動受信用セグメントを結合した伝送フレームを生成する。【選択図】図3 |
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Bibliography: | Application Number: JP20160203944 |