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Solutions > TD-LTE Solutions > 8-Antenna Dual-layer Beamforming Technology

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With a view to enabling smooth evolution from TD-SCDMA to TD-LTE and to accomplishing a low-cost and rapid network upgrade, Datang Mobile worked with TD-LTE 8-antenna dual-stream beamforming technology for TD-LTE outdoor macro cell coverage.

Solution

8-antenna dual-stream beamforming technology, which can be used where there are sufficient signal scatterers, efficiently brings together smart antenna beamforming technology (i.e. single-stream beamforming technology) and MIMO spatial multiplexing technology. In a TD-LTE system, it uses the symmetry of TDD channels to simultaneously transmit two beamforming data streams for spatial multiplexing. In addition, it can retain the features of single-stream beamforming technology in order to expand coverage, increase cell capacity and minimize interference so as to improve the reliability of cell edge users as well as the throughput of cell center users.

Depending on user scheduling, t五分时时彩网2019-07-2614:04反復出現職業院校違規安排學生實習的現象,足以說明當下對職業院校的約束和管理仍然有待加強,職業院校自身的辦學定位有待扭轉,其辦學宗旨和教育方式更需要認真反思。”段建娥囑咐道。his technology can be categorized into single-user and multi-user dual-stream beamforming technology.

In single-user dual-stream beamforming technology, the base station measures the upstream channels to glean their status information. It then calculates two beamforming vectors according to this upstream channel information, and uses the vectors for downlink beamforming of the two data streams to be transmitted. In single-user dual-stream beamforming technology, a single user can simultaneously transmit two data streams, and thereby benefit from beamforming gains and spatial multiplexing gains at the same time. In this way it can achieve a higher data rate than single-stream beamforming technology which increases the capacity of the system.

In multi-user dual-stream beamforming technology加拿大时时彩开奖号码”鹽城華科智造數據科技有限公司總經理黃逸華告訴記者,他們的項目可以為傳統制造提供數據驅動,包括故障預測、生產良率預測等。即便身材偏胖,只要能力出眾、學識豐富、自信禮貌、行為端莊、儀容整潔,也可去除一些外在影響。, the base station matches multiple users according to upstream channel information or UE feedback. It then, according to certain criteria, generates beamforming vectors, and uses the vectors for the beamforming of each UE and each stream. Multi-user dual-stream beamforming technology uses the smart antenna beam direction to enable multi-user spatial division multiple access (SDMA).

Solution performance analysis and validation

1. The system capacity is significantly increased in high-quality TD-LTE networks.

Dual-stream beamforming technology can effectively increase the TD-LTE system throughput. Compared with 2X2 MIMO TD-LTE antenna configuration, 8X2 dual-stream beamforming technology has much greater sector and edge throughput. According to the assessment of ITU, compared with 2-antenna MIMO technology, 8-antenna dual-stream 加拿大时时彩走势現在只要一個窗口,而且銀行開戶也進入大廳,我在網上提交的時候,直接選了銀行。北京青年報記者探訪發現,多款APP上均存在此情況。beamforming technology can deliver both sector and edge throughput of 80% and 130% higher respectively.

TD-LTE theoretical analysis demonstrates that TD-LTE 2-antenna coverage is limited to the upstream traffic channel. A simulation evaluation concluded that an upstream traffic channel edge rate of up to 64Kbps is a precondition. The radius of TD-LTE 8-antenna cell coverage extends over an area about double that of TD-LTE 2-antenna cell coverage. Compared with TD-LTE 2-antenna technology, 8-antenna technology requires significantly fewer TD-LTE 加拿大时时彩网址外觀方面,新車采用了全新一代SUV家族設計語言,前臉借鑒了科邁羅的設計風格。方正證券認為,同一個城市的改造,可能僅有個別幾家公司來實施,並以當地國企為主。stations and lower TD-LTE CAPEX.

2. The cell radius is increased in order to lower CAPEX.

The radius of TD-LTE 8-antenna cell coverage is about the same as that of TD-SCDMA. Therefore, 8-antenna TD-LTE technology can cover the same area and share the same site as TD-SCDMA technology. During the smooth evolution from TD-SCDMA to TD-LTE, the existing sites, antenna feed systems and other resources can be reused to further cut the TD-LTE CAPEX.

The TD-SCDMA network五分时时彩开户7月18-19日,廣東體彩上半年市場分析培訓會在潮州舉行。再如《遍地狼煙》,以樸素的現實主義創作手法,書寫了大時代背景下,英雄兒女們站在歷史理性、民族意志的高度上,譜寫的一曲慷慨悲壯、感人至深的抗戰之歌。 construction experience has shown that the actual radius of single TD-LTE station coverage may be only 500m or even less.A comparison of the coverage of TD-LTE 2-antenna and 8-antenna technologies with TD-SCDMA technology.

The simulation evaluation demonstrated that TD-LTE 8-antenna technology can effectively solve the coverage limit problem by expanding coverage while increasing the edge rate.

The above figure shows the coverage of TD-LTE 2-antenna and 8-antenna technologies. When the coverage radius is 500m, the upstream edge rate of TD-LTE 8-antenna and 2-antenna technologies is 500Kbps and 64Kbps respectively. This shows that while having the same cell coverage as TD-SCDMA, the TD-LTE 8-antenna technology can significantly increase the edge rate, while the edge rate enabled by the 2-antenna technology is almost the same as that of TD-SCDMA. To provide an edge rate of 500Kbps, TD-LTE 2-antenna technology covers only a 280m radius. Therefore, it can't cover the same area or share the same site as TD-SCDMA technology.

According to the analysis, TD-LTE 8-antenna technology can significantly increase coverage and provide a high TD-LTE data rate while extending over the same area as that enabled by TD-SCDMA technolo五分时时彩网”針對一段時間以來的“牙簽弩”傷童事件,全國人大代表,內蒙古科技大學包頭師範學院音樂學院副教授馬春雨說。2019-07-2415:03地鐵站、公交站命名的合理性與命名的程序是否恰當有關。gy.

3. Performance validation

In December 2009 at the Datang Telecom head office in Beijing, Datang Mobile convened a TD-LTE new technology press conference themed "Innovation Empowers Dreams", launching the dual-stream beamforming technology, and demonstrating the features of the TD-LTE network and the performance of 8-antenna dual-stream beamforming technology.

The TD-LTE network being demonstrated covered the area between Xueyuan Bridge and Xuezhi Bridge on Xueyuan Road in Haidian District, Beijing. The demonstration vehicle showed that the throughput of TD-LTE 8-antenna dual-str五分时时彩杀号凡本網注明“來源︰XXX(非新華網)”的作品,均轉載自其它媒體,轉載目的在于傳遞更多信息,並不代表本網贊同其觀點和對其真實性負責。劉振宇表示,從數據來看,已處理的群眾投訴主要涉及親屬關系證明、社保相關證明、戶口相關證明、公民身份證明、醫保相關證明、婚育狀況證明、無犯罪記錄證明、死亡證明、小微企業證明、公證相關證明等。eam beamforming technology was higher than that of 2-antenna MIMO technology in a dynamic channel environment.

During the demonstration, the TD-LTE 8-antenna dual-stream beamforming technology attained better coverage than the 2-antenna technology. At both ends of the demonstration road section, i.e. the edge of the 2-antenna system coverage, the throughput of the 2-antenna technology diminished while the throughput of the 8-antenna technology remained stable. When the demonstration vehicle went under an overpass at the edge of the demonstration road section, the signal reception was affected due to the obstruction of the overpass. The throughput of the 2-antenna system dropped significantly. The throughput of the 8-antenna system was also affected, but it dropped only slightly and then remained stable.

A statistical analysis of the throughput during the demonstration showed that the spectral efficiency of 8-antenna dual-stream beamforming technology is 40%-50% higher than that of 2-antenna MIMO technology.

Typical scenario

Primary TD-LTE network technology, which is used for macro cell coverage in outdoor environments.

Innovation & Evolution
 
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