We compared the performance of proposal system to multi-D phase modulation and turbo trellis-coded phase modulation in computer simulations, it was shown to be able to obtain the flexibility of the bandwidth efficiency without deteriorating the coding gain when there were a lot of numbers of ...
假设某模拟信道的最高频率是4kHz,最低频率是1kHz,如果采用PSK调制方法,其数据速率是(1);如果改为采用幅度一相位复合调制技术,由4种幅度和8种相位组成16种码元,则信道的数据率将变为(2)。空白处(1)应选择() A. 2kb/s B. 4kb/s C. 6kb/s D. 8kb/s 相关知识点: ...
通过正交幅度调制技术把ASK和PSK两种调制模式结合起来组成16种不同的码元,这时数据速率是码元速率的( )倍。 A. 2 B. 4 C. 8 D. 16
画画的橘子:三维家软件技巧‖持续分享接软件教学线上‖线下‖一对一||非群账号开通。画画的橘子入驻抖音,TA的抖音号是,已有400个粉丝,收获了3044个喜欢,欢迎观看画画的橘子在抖音发布的视频作品,来抖音,记录美好生活!
1 are singing 2 was 3 is looking 4 is going to visit 5 has 6 will leave 7 catches 8 doesn't know 9 goes went10 watches washes 11 made 12 are going to have13 Does go 14 are swimming 15 does do was
问题描述:16岁身高165CM正不正常,还有每周我都有5次左右的锻炼,影响身高吗。(男,16岁) 分析及建议: 是正常的运动会促进你长高。 咨询时间: 2016-10-19 患者 16岁身高165CM正不正常,还有每周我都有5次左右的锻炼,影响身高吗。(男,16岁) 曹竹兰医生 ...
百度试题 题目通过正交幅度调制技术把ASK和PSK两种调制模式结合起来组成16种不同的码元,这时数据速率是码元速率的()倍。 A. 2 B. 4 C. 8 D. 16 相关知识点: 试题来源: 解析 B.4 反馈 收藏