The frequency shift keying modulation is widely used in hf digital communication 移频键控是短波数字通信中常用的一种调制方式。
2.
This thesis focuses on the performance of complete complementary keying modulation and multi - carrier cdma architecture based on complete complementary codes ( ccc - cdma ) 本文主要研究了基于互补码扩频的cck调制性能和基于完全互补码扩频的多载波cdma系统性能，主要工作可以分为以下几个部分。
3.
Edge uses a new modulation scheme - 8psk ( 8 phase shift keying modulation ) - to enable the transmission of large amounts of data at a high speed - 384 kilobits per second using existing gsm infrastructure Edge是一种介于现有的第二代移动网络与第三代移动网络之间的过渡技术。 edge将是通向3g的一个重要里程碑。
4.
After elaborating the principle of an 802 . lib key modulation scheme - complementary code keying ( cck ) , this paper proposes and realizes a hardware circuit solution of 802 . 11b pcmcia wlan interface card , which can reliably offer a maximal 11mbps data rate and freely switch within 14 working channels in 2 . 4ghz frequency band 接着在详细阐述了802 . 11b协议核心调制技术?互补码键控( cck )的原理的基础上，本文提出并实现了一种峰值传输速率为11mbps的802 . 11bpcmcia高速无线网卡的硬件电路设计方案，在2 . 4ghz频段该网卡可在14个工作信道上自动切换，实现高速突发数据的可靠传输。
您当前位置：