cdma 1xrtt

CDMA2000 standard developed from IS-95 CDMA, and to the mobile phone users backward-compatible, that is, the existing IS-95 CDMA mobile terminals can still continue to use in CDMA2000 network. According to the development of CDMA2000, can be divided into 1xRTT and 3xRTT phase, 3xRTT CDMA2000 provides the maximum 20MHz channel bandwidth and 2.4MB/S data transmissi

CDMA module text message 1. send text messagesEg. Send the English Short Message "123abc" and use the corresponding ASCII code to send it.At + wscl = // set to send an English text message OKOKAt + cmgs = "13601193264" // different from the GSM module, the CDMA module must add a text message numberQuotation marks123abc + Cmgs: 1OKReturn Code :+ Cmgs: N indicates that the message is sent successfully, and N

the national 3G Expert Group continue to be intensively carried out, domestic and foreign equipment manufacturers to 3G research and development has been part of the product, more importantly, with the CDMA 1X and GPRS network into use, the frequent introduction of business, packet data services and users have been presses and nurtured, These all provide the condition for the large-scale application of 3G mobile communication network. 3G technology

Along with the technology renewal, the business development, the communication network also must unceasingly carry on the consummation and the development. China Unicom's CDMA network began construction in 2001, opened in early 2002, although the network development time is not long, but has experienced from scratch, from the process of excellent. At present, China Unicom CDMA Network has entered a new peri

The purpose of the wireless network evaluation is to analyze the network running data and give a reasonable evaluation. Including the quality of network planning, network operation, network operation problems, hidden dangers, network investment utilization and other projects, and then fully grasp the overall operation of the network, for the further optimization and construction of the network to provide a direct reference. In terms of GSM and CDMA n

China Mobile GPRS and China Unicom CDMA are the two major focus of mobile communications this year, on the one hand, their pilot operations to make mobile business more colorful, on the other hand, their operations exposed a variety of problems. What about GPRS and CDMA? , where they are primarily compared to mobile data communications services. GPRS and CDMA ha

March 28, 2003, Unicom CDMA 1X Network officially opened in the country, to "Unicom Unlimited" U-max for the overall brand of wireless data value-added services also in the country 31 key cities across the entire launch. China Unicom to the mobile GPRS launched CDMA 1X business, from the "Unicom Unlimited" (U-max) of the five sub-brand, Unicom is trying to strengthen the technical and business advantages. F

With the rapid popularization of mobile communication service, mobile communication operators and equipment suppliers take various measures to improve the system capacity and business type to meet the growing market demand. China Unicom in the construction and operation of CDMA network in the early stage, due to the constraints of various conditions, it is impossible to build a lot of base stations, the number of base stations will cause inadequate si

China Telecom should discard the CDMA network in a short time 4G era has arrived, because the current 4G FDD-LTE photo has not yet been issued, basically mobile drama, mobile is testing VoLTE, it is strange that China Telecom claims to test the VolTE technology some time ago, but it has not put forward such a test demand in its current mobile phone demand. Theoretically, mobile has the best GSM network in the world. In the 4G era, the voice bearer ne

CDMA is the abbreviation of code-division multiple Access technology, it is a kind of advanced wireless spread spectrum communication technology in the process of digital mobile communication, it can satisfy the demand of the market for the capacity and quality of mobile communication, has high spectrum utilization, Good voice quality, confidentiality, low rate of drop, electromagnetic radiation small, large capacity, covering a wide range of characte

At present, the technical aspects of the CDMA network are mainly related to the quality of the handset, the call off line, the connection rate, the network coverage and the interconnection of other network mobile users. How to solve these problems of users is a very important factor in the development of Unicom CDMA. For CDMA networks, the high drop rate, low com

I. Understanding the specific situation on the ground CDMA Network Wireless planning should make full use of the local population, economy, geography and other basic information, at the same time to reflect the local characteristics, such as reflecting the imbalance of the economic development of a certain characteristics, reflecting a certain key township is very developed, the gap between urban and rural areas of small characteristics.

Absrtact: Unicom CDMA 1X Test Network is in Beijing, Shanghai, Guangzhou, Hangzhou, Chengdu, Nanchang, Hainan 7. It is based on 95A online equipment manufacturers distribution, and fully consider the future of the network upgrade of the various possibilities for the future construction of the preparation and accumulation of experience. This article mainly talks about its core network construction. 1 background, purpose and content of the test The ma

From: China Mobile Communication Forum I. CDMANetwork China Unicom announced the large-scale development of CDMA networks and explicitly proposed the implementation of SIM card functions similar to the GSM system in the CDMA system. This action immediately aroused strong repercussions at home and abroad. In China, many people argue over the advantages and disadvantages of the SIM card (called uimcard in

This year, the entire Chinese wireless business market competition is very fierce. With the shift of voice service to data service, the competition of voice service tends to homogeneity, and the new market gradually shifts to the low-end, so the competition between the two mobile operators is very fierce, and the two sides are becoming more and more fierce in the contention of the mobile business. In addition, the introduction of PHS makes the whole tariff has a downward trend, and PHS in the ma

NetEase technology News September 22, the CDMA Development Organization (CDG) announced that the number of global CDMA users has exceeded 500 million. At the end of the second quarter of 2009, a total of 502 million users used CDMA series technology (including cdmaone™), of which CDMA 2000 and ev-do broadband users rea

It is reported that China Unicom to "World Wind" named dual-mode mobile phone and dual-mode business will be formally presented in the end of July in front of Chinese users. The meaning of the dual-mode mobile phone is to provide a seamless mobile communication experience for the end users, so that those who are often in the mobile business people truly realize the "one machine around the world" dream. At the same time, dual-mode mobile phone will also be very good integration of the advantages

This article mainly introduces the principles of CDMA wireless network technology in detail, and gives you a detailed explanation. I believe this article will help you. In fact, the CDMA technology has been used long ago. It may be that, for various reasons, the introduction of China has not been able to fully leverage its advantages. So what are the specific advantages of it? What is the principle? I will

The development of mobile communication technology has gone through three stages, that is, the industry called Three generations, the first generation is analog wireless network such as amps, TACs, the second generation is digital communication, including GSM, CDMA, the third generation is the packet-type mobile service, referred to as 3G. As mankind entered the 20th century, the third generation of mobile communication technology and users will be a

Spectrum utilization, supporting high speed multimedia services, system capacity, multipath channel interference and other factors are the main starting points for the majority of fixed broadband wireless access devices to select CDMA (Code Division multiplex) or OFDM (Orthogonal Frequency Division multiplexing) as the key technology for point to Point (PMP). And these two technologies have their own strengths in these areas, so the equipment business