CN1053156A - 信号传输频带压缩技术 - Google Patents

信号传输频带压缩技术 Download PDF

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Publication number
CN1053156A
CN1053156A CN 90105004 CN90105004A CN1053156A CN 1053156 A CN1053156 A CN 1053156A CN 90105004 CN90105004 CN 90105004 CN 90105004 A CN90105004 A CN 90105004A CN 1053156 A CN1053156 A CN 1053156A
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signal
bandwidth
channel
transmission
band
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CN 90105004
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刘东平
邹百舒
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Individual
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Abstract

本发明的目的是提供一种新型信号传输频带压 缩技术。本发明可大大减小信号的传输频带带宽,可 使其在信道上传输时只占原信号带宽的几分之一或 几十分之一。从而可以充分利用有限的传输信道带 宽,实现信号窄带传输(如在载波系统中,未采用本发 明时,一路音频话为300~3400Hz,频带宽3100Hz; 采用本发明后,频带宽约为400Hz),或实现在原信 道中多路复用的目的。

Description

本发明属通信技术领域传输类。
目前,国内外电信传输中,各种模拟信号均已有国际标准的最小传输带宽。如电话信号传输的带宽为4KHz、视频信号传输的带宽为4.2MHz、可视电话信号传输约为1MHz。而其中有的已采用了信号频带压缩技术,如载波系统中的话音带宽为0.3~3.4KHz,采用了抑制载频和边带技术的频带压缩技术。但均未能将频带压缩至最理想的程度,所占频带仍很宽。
本发明的目的是为了提供一种新型信号传输频带压缩技术。
本发明可使信号在信道上传输时只占原信号带宽的2△FHz/n(式中:△F-调制信号的最高频率,单位Hz;n-分频数,n为正整数)。从而可以充分利用有限的传输信道带宽,实现信号窄带传输,或在原传输信道中多路复用。
本发明是先将信号经调频、分频压缩频带成模拟信号后,通过新的窄带信道(采用本发明压缩信号传输频带后设计的新信道)或原信道(未采用本发明,传原信号用的信道)传输至终端后,倍频、解调使信号复原(见附图)。
下面结合附图,以话音传输为例,详尽说明本发明,可以清楚地了解本发明的宗旨及特征。
按本发明,0.3~3.4Hz的话音信号在压缩时,首先进行调频。如令调制频率的最高频率△F为10KHz、调频指数mf>2,则有效频带m=2△F=20KHz。如主振器频率为180KHz,调频器输出频率则为180~200KHz。经分频器64次分频,信号频率则为2.812~3.123kHz,带宽为312.5Hz。再经2.8~3.3KHz的带通滤波器滤波后,则成模拟信号即可进入模拟信道传输。
该信号经信道(可采用传输原信号的信道,如载波信道)传输至终端后,经2.8~3.3KHz的带通滤波器滤波,通过倍频器64次倍频,信号频带为180~200KHz,再经鉴频器鉴频,则可恢复原0.3~3.4KHz语音信号,从而实现了信号传输频带压缩。
本发明可按上述方法实现双工传输。

Claims (2)

  1. 本发明属通信技术领域传输类。其特征是:
    1、一种用于电信传输,采用调频、分频的方式来压缩信号传输频带带宽或压缩已经调制过的信号传输频带带宽的技术。
  2. 2、权项1条件下的技术,是将信号采用调频、分频的方式进行频带压缩成模拟信号,通过新信道(采用本发明压缩信号传输频带后设计的窄带信道)或原信道(未采用本发明,传输原信号所用的信道)至终端后,采用倍频、解调的方法复原信号,从而减小信号传输频带带宽的新型信号传输频带压缩技术。
CN 90105004 1990-01-05 1990-01-05 信号传输频带压缩技术 Pending CN1053156A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 90105004 CN1053156A (zh) 1990-01-05 1990-01-05 信号传输频带压缩技术

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 90105004 CN1053156A (zh) 1990-01-05 1990-01-05 信号传输频带压缩技术

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CN1053156A true CN1053156A (zh) 1991-07-17

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CN 90105004 Pending CN1053156A (zh) 1990-01-05 1990-01-05 信号传输频带压缩技术

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1326415C (zh) * 2001-06-26 2007-07-11 诺基亚公司 对音频信号进行代码变换的方法、码变换器、网元、无线通信网和通信系统

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1326415C (zh) * 2001-06-26 2007-07-11 诺基亚公司 对音频信号进行代码变换的方法、码变换器、网元、无线通信网和通信系统

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