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Description: cdma2000 1x语音编解码程序，并带有测试用例，很好用-cdma2000 1x voice codec procedures and with test cases, very good use
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Size: 362496 |
Author: 王永 |
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Description: 一个cdma2000的系统仿真器，附英文手册-The cdma2000-UV Simulator estimates the performance of data transmissions at the physical layer
of the mobile communications technology cdma2000 1X. These wireless data transmissions enable
the communication between mobile stations (e.g., cellular phones, PDAs, laptops) and base
stations (i.e., the communication systems that provide network access to the final user). Examples
of these transmissions include voice, e-mails, and text messages. The simulation results are
calculated according to the simulation parameters set by the user. For example, the user may set a
non-moving mobile station in an indoor environment or a moving mobile station in a vehicular
environment. With the results obtained with the simulator, the user can perform different analyses
such as the degradation in system performance due to an increase of the number of mobile stations
or the effects of multipath channels on CDMA transmissions. Also, the cdma2000-UV Simulator
assists the user in understanding the
Platform: |
Size: 10449920 |
Author: han |
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Description: WB-AMR VMR-WB 是新型可变速率多模式宽带语音编解码器，专为无线 CDMA 2000标准而设计，目的在于在 50 至 7000 HZ 的频带上进行语音编码，采样率为 16 KHZ。VMR-WB 基于 3GPP AMR-WB (G722.2) 编解码器，在每秒速率12.65 Kbit 上可实现互操作。 VMR-WB 工作模式有四种，具体选择哪种应视网络的流量情况而定。前三种模式专门针对 CDMA 系统，而第四种模式为 AMR-WB 互操作性模式。 VMR-WB 与 AMR-WB 的互操作性允许 GSM/WCDMA 与 CDMA2000 系统无须进行自动解码即可通信，这就不至于增加额外的延迟以及引起语音质量下降-WB-AMR VMR-WB is a new variable-rate multimode wideband speech codec designed for wireless CDMA 2000 standard design, aimed at 50 to 7000 HZ frequency band for voice coding, sampling rate of 16 KHZ. VMR-WB based on the 3GPP AMR-WB (G722.2) codec rate of 12.65 Kbit per second can be interoperable. VMR-WB mode four, the specific choice of which network traffic should be as the case may be. The first three models specifically for the CDMA system, while the fourth mode of AMR-WB interoperable mode. VMR-WB and AMR-WB allows the interoperability of GSM/WCDMA and CDMA2000 systems can not automatically decode the communication, which without increasing the delay and the additional decline in voice quality caused by
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Size: 189440 |
Author: 观光客 |
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Description: cdma2000 network architecture
Call processing states and call flows
CDMA evolution
Essential elements in a CDMA system
Power Control
Mobility management
Handoffs
Registration
Roaming
Radio Admission Control1X EV-DO (1xRTT Evolution for high-speed integrated Data Only)
The objective is to provide the largest practical number of users to run high-speed packet data applications
2.4 Mbps packet data
1X EV-DV (1xRTT Evolution for high-speed integrated Data and Voice)
Voice and High Speed Data mixed on one carrier
Backward-compatible with CDMA2000 1X
3.1 Mbps packet data
Platform: |
Size: 580608 |
Author: Aanandha Saravanan |
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