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| Digital radio industry market prospects |
| | Add time:2019/5/16 | Digital radio has a vast market in our country, but has since not been rational development. The introduction of a series of national policy for digital radio development paved the way.
Market prospects
Market relations is an important issue for the first digital radio development. Digital radio should have a reasonable and allow the user to accept the price, that is a good price. Our walkie-talkie market relatively broad: Many professional sector can not build digital trunking communications network, such as the majority of the grassroots departments and units, the smaller their work space, less staff, but higher demand for communication services and functions. In this case, the digital radio becomes a better choice. In addition, small and medium sized airports, small ports, railway stations, the national grid, coal, oil and gas fields, construction sites and also typical digital radio application areas.
According to the Ministry of Railways official said, although the railroad has been determined using the GSM-R system, but there are a lot of stations, stations communication needs digital radio equipment. Public security and armed police believe that digital trunking communication network usually in large, urban construction, a lot of work at the grassroots level and remote areas, who can only use digital radio communications. In fact, not only the above-mentioned these departments need to use digital radio. There are nearly 160 civil airports (up to 2020 will be increased to 240 or so), conditional build digital trunking communications network only a few dozen, the majority of small-scale, less flights Airport just have to meet the requirements of digital radio . In addition, the country more than 160 ports and civil aviation similar situation.
Policies to promote market
September 13, 2007 Ministry of Information Industry has issued a letter of no letter file 81 [2007] "on release" RF digital radio system equipment technical requirements "(Trial)", although this is a trial document, but At that time also started the development of digital radio and a rule-based.
This document determines the digital radio RF indicator is suitable for 137MHz ~ 167MHz, 403MHz ~ 425MHz and 915MHz ~ 917MHz frequency bands and the use of the three two kinds of 12.5kHz and 6.25kHz channel spacing, the former TDMA2 slot, the latter FDMA (Single Road). In fact, when this document issued by approved non-commissioned models of digital radio only a dozen models, mainly Motorola, Kenwood and Icom three foreign companies a variety of digital radio products, at a time when domestic production digital radio only two.
But in the national policy support, the domestic digital research and development, production, chip and software development walkie-talkie machine after another move up. Such as Electronic Engineering, Tsinghua University launched our self-developed "sub-band sinusoidal excitation linear prediction (SELP)" speech codec series (including 2.4kb / s, 1.2kb / s and 600b / s) has matured.
Through continuous research, the Ministry of Industry and Information Technology Radio Authority in December 12, 2009 and issued a formal Ministry of Industry and Information Technology no document [2009] No. 666 "Industrial and Information Technology Ministry of 150MHz400MHz band frequency planning and dedicated walkie-talkie Use notification management related matters. "
Talkie is China's mobile communication system last system from analog to digital. Secretary at the Ministry of Radio Authority Xie Feibo on a digital radio forum pointed out: "Although digital radio market is much smaller than the 3G, but its social and status is very important." He specially emphasized the fight against snow and ice earthquake in specialized mobile communication played an important role. Xie Feibo also pointed out that more and more low price walkie-talkie, the user is also increasing. Therefore, radio interference to civil aviation, military aviation and railways frequently occur, which has attracted the attention of General Secretary Hu Jintao. Digital radio there must be stable again stable, reliable and reliable again. To consider not only the market, but also consider safety.
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