C凵rren 猛 ly , 重 he broa曲 and FM ls 騒sed 置 br 5a 豊 e 隠 鮭e broa"cas 伽 g 5yste 鳳 i購 the 12 GHz band . For 鯉 贐 re 21GH 罵 band broadcasting s アs 重 ems , digita 置broadcasti龍g wi 睚 be expected because of 山 e hlgher佃exibi 輯ty and compa 髄bility wi 跏 other digilal media ・ The informatiOn bit rate wi11 韮 ncreaSe acCOrding 重 O requireme 臓重 of defini 重 ion a 跏d chann εls . The 21 GHz band sa 重 e 腿醜e broadca5ling 駐as degrada ヒ ion o「 perIbmance dロe 重 o rain. . ThereIbre , we ロeed to adopt mo 山 la 鹹o 闘

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... 重 hat has 甜 ▼a 耐 age to 闘 oi5e a 隅盛 eMciency of 「 陀 que 随cy bands. This p叩 er describes co 騨 sideration o 『QPSK tts 苴 ng 量 he con ▼olu 電 io 囗 al coding and the lreIliS COded 8 PSK for digital sa 量 el5i邑 e broad螂 重 ing sys重 em l腿 2鼠 G 池 band 眇 表 ー { 豊