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Description: IDMA是未来4G移动通信的关键技术之一，其优势在于它更好的完成功率分配，实现更大的业务容量，并且不会损失用户的服务质量-IDMA is the future key technologies for 4G mobile communications, one of its strengths is that it is better to complete power distribution, to achieve greater business capacity, and will not damage the user' s quality of service
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Size: 3272704 |
Author: 王宇坤 |
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Description: Offered in 512Mx8bit or 256Mx16bit, the K9XXGXXXXM is 4G bit with spare 128M bit capacity.
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Size: 440320 |
Author: qwerty |
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Description: Beyond third generation (B3G) and fourth
generation (4G) communication systems require
bandwidth efficiency and low complexity receivers to
accommodate high data rate and large number of
users per cell. This paper provides the
recommendations for why Interleave Division Multiple
Access (IDMA) stands out among all the present day
multiple access systems. Even if IDMA is a special
case of Code Division Multiple Access (CDMA), it
simply trounces CDMA as far as the cell capacity is
concerned. In IDMA, interleavers are used as the only
means for user separation. Interleaver size can be
varied for a set of users but the recommended
interleaver size is 1024bits at which it provides better
efficiency and minimum processing delay.
Investigations carried throughout this paper are while
using 1024 bit interleavers. IDMA exhibits the
tendency to handle huge number of users.
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Size: 366592 |
Author: raghaw |
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Description: Beyond third generation (B3G) and fourth
generation (4G) communication systems require
bandwidth efficiency and low complexity receivers to
accommodate high data rate and large number of
users per cell. This paper provides the
recommendations for why Interleave Division Multiple
Access (IDMA) stands out among all the present day
multiple access systems. Even if IDMA is a special
case of Code Division Multiple Access (CDMA), it
simply trounces CDMA as far as the cell capacity is
concerned. In IDMA, interleavers are used as the only
means for user separation. Interleaver size can be
varied for a set of users but the recommended
interleaver size is 1024bits at which it provides better
efficiency and minimum processing delay.
Investigations carried throughout this paper are while
using 1024 bit interleavers. IDMA exhibits the
tendency to handle huge number of users.
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Size: 268288 |
Author: raghaw |
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Description: "Advanced Wireless Networks 4G Technologies". New E-Book. In the wireless communications community we are witnessing more and more the existence
of the composite radio environment (CRE) and as a consequence the need for reconfigurability
concepts. The CRE assumes that different radio networks can be cooperating components
in a heterogeneous wireless access infrastructure, through which network providers
can more efficiently achieve the required capacity and quality of service (QoS) levels. Reconfigurability
enables terminals and network elements to dynamically select and adapt
to the most appropriate radio access technologies for handling conditions encountered in
specific service area regions and time zones of the day. Both concepts pose new requirements
on the management of wireless systems. Nowadays, a multiplicity of radio access
technology (RAT) standards are used in wireless communications.
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Size: 12845056 |
Author: Mantvydas |
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Description: 4G协作中继系统中OFDM系统容量，在MATLAB中的仿真图实现-4G OFDM cooperative relay system, system capacity, in the MATLAB implementation of the simulation map
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Size: 10240 |
Author: 姜一帆 |
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Description: 目前，基于USB2.0接口的移动存储设备已经被广泛使用，尤其是采用USB-FLASH技术的U盘产品的容量由几年前的16M增加到现在的4G以上。我们知道，U盘通常是作为计算机的外部存储设备，能否脱离计算机直接向U盘读写文件呢？答案是肯定的。USB118系列嵌入式U盘读写模块提供了通过串口或SPI口读写U盘的简单途径，由此结合单片机的TTL串口或高速SPI总线就可以实现对U盘上的文件读写。 USB118AD型高速U盘读写模块是对USB118A模块的性能进行改进后的USB2.0接口的高速模块，具有与USB118A模块完全兼容的串口，同时增加了高速的SPI接口，主要应用于便携仪器或者嵌入式数据采集系统的外挂式海量存储。-Currently, based on USB2.0 interface for mobile storage devices have been widely used, especially in the use of USB-FLASH technology, U-disk product capacity from a few years ago more than 16M to 4G now. We know, U disk is usually used as an external computer storage device, whether from a computer directly to the U disk read and write files? The answer is yes. USB118 Series U disk read and write embedded module provides a serial port or SPI port through U disk read and write simple way, which combined with single-chip high-speed TTL serial port or SPI bus can achieve read and write files on the U disk. USB118AD high-speed U-disk read-write module is USB118A module performance improved high-speed USB2.0 interface module, a module is fully compatible with USB118A serial port, while increasing high-speed SPI interface, mainly used in portable devices or embedded data acquisition system of plug-in mass storage.
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Size: 608256 |
Author: 李明 |
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Description: 新一代移动通信(beyond 3G／4G)，将提供高速的数据传输速率，以支持新业
务的不断涌现。如何在有限的频谱资源上实现高速率和大容量是未来移动通信系
统的关键因素之一。-The next generation of mobile communications will be able to provide a hi曲data
transfer rate to support the continuous emergence of new business．The key challenge of
mobile communication system is how to achieve hi曲-speed and large—capacity in the
limited spectrum resource
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Size: 3695616 |
Author: 蜡笔 |
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Description: 宽带无线通信是信息化社会发展的助推器，它正在改变人们的生活方式，人
们将可以在任何时候、任何地点享受数字冲浪、视频点播、时频会议等新的时髦。
MIMO系统的信道容量与发射端和接收端的最小天线数成线性关系，这使MIMO技
术成为LTE、B3G和未来4G系统中最有前途的技术之一。-Broadband wireless communication is the booster for the development of information society, it is changing people s way of life, man
They will be able to at any time, anywhere to enjoy digital surfing, video on demand, such as time-frequency meeting new fashionable.
Channel capacity of MIMO system and the transmitting terminal and receiving the minimum antenna number into a linear relationship, the MIMO technology
Art become a future 4 g LTE, B3G, and one of the most promising technologies in the system.
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Size: 1436672 |
Author: liu |
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Description: The ever growing traffic explosion in mobile
communications has recently drawn increased
attention to the large amount of underutilized
spectrum in the millimeter-wave frequency bands
as a potentially viable solution for achieving tens
to hundreds of times more capacity compared to
current 4G cellular networks. Historically,
mmWave bands were ruled out for cellular usage
mainly due to concerns regarding short-range
and non-line-of-sight coverage issues. In this
article, we present recent results channel
measurement campaigns and the development of
advanced algorithms and a prototype, which
clearly demonstrate that the mmWave band may
indeed be a worthy candidate for next generation (5G) cellular systems-The ever growing traffic explosion in mobile
communications has recently drawn increased
attention to the large amount of underutilized
spectrum in the millimeter-wave frequency bands
as a potentially viable solution for achieving tens
to hundreds of times more capacity compared to
current 4G cellular networks. Historically,
mmWave bands were ruled out for cellular usage
mainly due to concerns regarding short-range
and non-line-of-sight coverage issues. In this
article, we present recent results channel
measurement campaigns and the development of
advanced algorithms and a prototype, which
clearly demonstrate that the mmWave band may
indeed be a worthy candidate for next generation (5G) cellular systems
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Size: 1519616 |
Author: kazim |
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Description: LTE & LTE-Advanced coupled with small cells & relays will address these fast
growing wireless data capacity demands
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Size: 746496 |
Author: Hiren Bhalala |
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Description: 无线通信系统可以利用的资源包括：空间、时间、频率和功率。在B3G/4G系统中，空间资源和频率资源被重新开发使用，从而大大提高了系统的性能。
多天线技术在发送端和接收端同时使用多根天线，扩展了空间域，充分利用了空间扩展所提供的特征，从而带来了系统容量的提高。目前多天线技术已成为了B3G/4G系统的关键技术之一。
-The resources that the wireless communication system can use include: space, time, frequency and power. In the B3G/4G system, the spatial resources and the frequency resource are re- used, which greatly improve the system performance..
Characteristics of multi antenna technology in sending end and simultaneous use of multiple antennas at the receiver, to expand the spatial domain, make full use of the space extensions are provided, which brought the system capacity to improve. At present, multi antenna technology has become one of the key technologies of B3G/4G system..
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Size: 2048 |
Author: robin |
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Description: calculate capacity and mimo strategy for 4G
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Size: 16384 |
Author: om9asem
|
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Description: MM32开发板活动资料
1 个标准的 JTAG/SWD 调试下载口
1 个电源指示灯（蓝色）
2 个状态指示灯（DS0:红色，DS1 :绿 色 ）
1 个 IIC 接口的 EEPROM 芯片，24C08，容量 1024 字节
1 个 SPI FLASH 芯片，S25F008A，容量为 1M 字节（即 8M bit)
1 个标准的 2.4/2.8/3.5/4.3/7 寸 LCD 接口，支持触摸屏
1 个 OLED 模块接口（与 LCD 接口部分共用）
1 个 USB 串口接口，可用于程序下载和代码调试
1 个 USB SLAVE 接口，用于 USB 通信
1 个 Micro-SD 卡接口
1 个 PS/2 接口，可外接鼠标、键盘
1 组 5V电源供应/接入口
1 组 3 . 3V电源供应/接入口
1 个启动模式选择配置接口
1 个 2 . 4G无线通信接口
1 个 RTC 后备电池座，并带电池
1 个复位按钮，可用于复位 MCU和 LCD(1 standard JTAG/SWD debug Downloads
1 power indicator light (blue)
2 status indicator (DS0: red, DS1: green)
The 1 IIC interface's EEPROM chip, 24C08, has a capacity of 1024 bytes.
The 1 SPI FLASH chip, S25F008A, has a capacity of 1M bytes (8M bit).
The 1 standard 2.4/2.8/3.5/4.3/7 inch LCD interface supports touch screen.
1 OLED module interfaces (shared with LCD interface part)
1 USB serial interface, can be used for program downloading and code debugging.
1 USB SLAVE interfaces for USB communication
1 Micro-SD card interfaces
1 PS/2 interface, external mouse, keyboard
1 sets of 5V power supply / access ports
1 sets of 3.3V power supply / access ports
1 boot mode selection configuration interface
1 2.4G wireless communication interfaces
1 RTC back-up battery pedestal and battery
1 reset buttons that can be used to reset the MCU and LCD)
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Size: 3978240 |
Author: waerdeng |
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Description: N720 是一款基于高通平台的 4G 全网通工业级模块，外型尺寸为 30mm *28mm *2.8mm。工业
级高性能：超宽工作温度达到-40℃到+85℃，静电能力达到 8KV；支持国内移动/联通/电信三大运
营商的 2G/3G/4G 网络制式，适合用于开发无线抄表终端、车载、手持 POS、工业路由器等物联网
通讯设备。(N720 is a 4-G all-network industrial module based on Qualcomm platform. Its size is 30mm * 28mm * 2.8mm. Industry
High performance: Ultra-wide working temperature up to - 40 C to + 85 C, electrostatic capacity up to 8KV; Support domestic mobile/unicom/telecommunications three major transport
Business 2G/3G/4G network format, suitable for the development of wireless meter reading terminals, vehicle, hand-held POS, industrial routers and other Internet of Things
Communication equipment.)
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Size: 3163136 |
Author: williamtony |
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