民用飞机数据链通信管理技术

数据链通信管理主要管理接入到飞机的不同数据链路网络,并支持与数据链路相关的 各种不同应用,包括航空公司的服务和空中交通服务。研究了民用飞机数据链通信管理 的典型架构及工作原理,给出了数据链的飞机通信寻址报告系统(ACARS)及航空电信网(ATN) 协议栈架构、功能及其支持的各种应用,总结和比较了通信管理及数据链支持的各种应用及 其关系。     

民航VHF ACARS数传通信系统消息处理方案

介绍了民航超高频(VHF)飞机通信寻址与报告系统(ACARS)机载通信系统及通过该系统实现地空数据链通信管理采用的ACARSIP应用消息处理机制,采用了基于DSP+FPGA的ACARS通信系统消息处理方案,描述了上行消息处理、下行消息处理、CSMA机制、信道质量检测、子网统计数据和审计模式等六个方面进行的设计与实现。最后对ACARS通信系统消息处理进行了总结分析,并指出了该实现方案可推广应用的方向。目前该方案已应用于国内民航ACARS数传通信系统中,并实现了与国际民航电台的互通,正确接收率达到100％,通信稳定可靠。     

VDL4:一种新型航空VHF数据链

甚高频(VHF)数据链在当今航空通信中具有十分重要的作用。目前航空数据链各异,并各具优势。文中主要论述VDL4,首先介绍了其基本设备结构,说明了协议的层次模型,然后分析了VDL4的时隙选择、网络接入、信道管理等关键技术,最后将它和其余VDL模式数据链进行了比较,从而说明VDL4是一种能满足新航行系统需求、极具竞争力的航空数据链。     

机载甚高频ACARS数据链系统及通信管理单元设计

装备通信管理单元、甚高频电台等机载设备的飞机具备接入飞机通信寻址与报告系统（ACARS）地空数据网络的能 力。分析了甚高频ACARS数据链机载系统的结构,探讨了通信管理单元的服务功能和应用功 能,基于通信管理单元与甚高频数传电台、机上系统以及驾驶舱之间的接口和协议,设计了 实现ACARS协议的通信管理单元的软件结构模型。     

新一代航空电信网技术及其应用进展

新一代航空电信网(Aeronautical Telecommunication Network,ATN)是新航行系统的重要基础,目前在民航组织的积极推动下,ATN网络已经进入部署实施阶段。本文介绍了ATN的背景、应用程序、体系结构等技术,并介绍了ATN网络目前的应用进展。     

甚高频ACARS通信系统物理层信号处理单元设计

通过对民航ACARS数据链通信系统物理层的深入研究,采用通用信号处理开发平台,设计 开发了DSB-AM/MSK调制解调器,引入CSMA忙闲检测及信道质量检测机制,结合实际 工程应用,实现了与国际民航电台的可靠互通,为民航ACARS通信系统的自主工程研制奠定 了基础。     

实现飞机状态监视的ACARS数据链新应用

法航447空难和马航370失联事件促使航空公司更关注对飞机的监控。分析了常用的飞机通信和监视手段,提出了一种使用ACARS实现飞机状态监视的数据链应用,通过飞机信息处理、消息封装、数据压缩和信息编码4个实现步骤,周期下传包含飞行参数、飞机系统状态和故障告警信息的ACARS消息。该方法间接提升了ACARS网络的信息容量,使航空公司等地面用户能够实时全面监视飞机状态。     

新型航空电信网络的过渡与实施研究

新型航空电信网是一种立体的航空数据网络。它主要用于在空中交通服务单位之间传递和交换飞行动态和飞行计划,移交和协调空中交通服务,也是CNS/ATM重要组成部分。重点阐述从ATN的结构组成以及从AFTN到ATN过渡的实施方案。     

基于感知的航空通信系统试飞频率管理

信息技术的快速发展以及频谱用户大增致使无线电频谱成为非常紧缺的资源。航空电子 系统设备量大,功能多,工作频段宽,电磁环境复杂,共址电磁干扰不可避免。科学规划试 飞频率,规避干扰是试飞成功的关键。在分析航空通信系统技术特征的基础上,提出了基于 频谱感知技术的航空通信系统试飞频率管理方法。该方法能够有效提高系统频谱利用率,并 能支持试飞数据相容性分析及重建,提升航空通信系统试飞评估准确性。     

一种远距离航空型变换域通信系统设计与仿真

传统的变换域通信系统(TDCS)在获得强抗干扰能力的同时,其对通信双方电磁环境必须保持一致的约束条件也成为制约其广泛应用的技术瓶颈.为了解决复杂电磁环境下指挥电台和机载电台之间的通信问题,在传统TDCS的基础上提出了一种远距离航空型变换域通信系统.给出了其总体方案,对TDCS空地收发信机模型中的各功能模块进行了较详细的分析,并通过采用 M 元扩频通信体制实现了基函数的可靠传递,从而将通信双方电磁环境不一致转化为等效一致.利用MATLAB软件仿真验证表明,TDCS抗多音干扰的性能优于直接序列扩频.     

The integrated use of social media,digital, and traditional communication tools in the B2B sales process of international SMEs

Social media and digital tools are gradually changing the way firms market themselves. Understanding how these communication tools are used by sales functions within business-to-business (B2B) markets could clarify the dynamics underpinning the sales process in an increasingly technology-mediated world. This paper explores how social media, digital, and traditional sales communication tools are leveraged during the three main phases of the B2B sales process within international SMEs.The article’s grounded-theory approach illustrates that social media can be particularly helpful in engaging international prospects. Digital communication tools seem to be most prevalent in the persuasion phase, whereas more traditional communication tools still prevail in customer relationship management. However, there seem to be some important potential boundary conditions, including relationship culture, location proximity, technology innovation/resources, and strategic importance of the customer that affect the way international SMEs use different communication tools during a sales process. We develop a framework for understanding the B2B sales process flow with sales communication tools included for international SMEs.     

Social Network Analysis and Communication in Emergency Response Simulations

In this article, social network analysis (SNA) is applied on two emergency responses, involving chemical, biological, radiological, nuclear, and explosives (CBRNE) simulations. However, SNA has seldom been used in the literature to explain communication breakdowns, leading to the question of “can it?” To examine the applicability of SNA when assessing communication, the SNAs of two CBRNE simulations are compared and the structural differences are related to instances of ineffective communication. Study 1 has two tiers in the response (commanders and first responders) and Study 2 has three tiers, where operations officers are added between the commanders and first responders. A higher percentage of communication breakdowns is found in Study 2, possibly as a result of the additional layer. SNA provides researchers with a convenient representation and summary of team functioning. However, basic SNA does not help researchers distinguish between effective communication and breakdown. Breakdowns are attributed to long multi-hop communications, attributable to larger networks.     

Winning Hearts and Minds: Business-to-Business Branding and the Role of the Salesperson

Many business-to-business firms recognise that strong brands can be a valuable resource in today's competitive business environment. To realise the potential of B2B brands, effective communication of brand values is essential. In most B2B markets, the primary form of brand communication is through the sales force and their ability to adapt sales strategies and messages to accommodate customer interactions. There are gaps in the literature regarding the brand value communication process in the customer-salesperson dyad. We argue that successful B2B brand communication requires sales strategies that incorporate brand values appealing to the emotional and the rational concerns of organisational buyers. This paper examines the brand communication process in the salesperson-customer dyad and the extent to which adaptive selling based on a brand platform of rational and emotional brand values could better respond to buying centre members.     

第三代移动通信国际标准的确立及其演进策略

以移动通信发展进程中2G所面临的问题为背景，介绍了ITU通过的包括我国TD－SCDMA提案在内的第三代移动通信国际标准，并在比较3G主流技术的同时简述了TD－SCDMA的特点，提出了我国2G向3G演进的方案及其相关思考。     

心理学眼中的品牌传播

心理学是品牌传播的基础。本文结合品牌传播的实践,从心理学的角度对品牌传播进行分析,认为：（1）品牌存在的基础是满足心理需求,心理需求的满足是衡量生活水平高低的标准。（2）物质需求与心理需求不能截然分开,满足物质需求的产品同时附加了满足心理需求的功能,品牌传播可以无限拓展心理需求空间。     

面向未来无线通信系统的小蜂窝网络综述

为了满足人们日益增长的数据流量需求,未来无线通信系统将向更小的小区部署迁移。小蜂窝网络是下一代无线通信系统的关键技术,也是适应未来更加复杂通信环境的有效途径。首先介绍了小蜂窝网络的基本概念,论述了其主要的技术特点和独特的应用优势,分析了其在未来无线通信系统中与其他各种技术可能的融合场景并讨论了对应的特点和存在的难题;然后概述了小蜂窝网络技术发展过程中所面临的主要挑战,分析了目前主要的研究成果和解决方案;最后,结合下一代无线通信的关键技术,如大规模多输入多输出通信、毫米波通信、D2D（Device-to-Device）通信和认知无线电技术等,总结了小蜂窝网络的应用现状并分析了其市场和发展前景。     

Is Symmetrical Communication Ethical and Effective?

The purpose of this paper is to explore two questions:(1) Is symmetrical communication in public relations practice inherently ethical?(2) Does symmetrical communication contribute to public relations effectiveness and organizational effectiveness? Three surveys are undertaken to test seven research hypotheses for the purpose of cross-validating research findings. The results suggest that symmetrical communication is inherently ethical. Moreover, symmetrical communication indeed contributes to several performance measures, which include positive market performance, overall organizational effectiveness, conflict resolution, crisis management, favorable organizational reputation, and positive media exposure, with the last two measures only partially supported.     

Corporate association strategies and consumer responses: The relative effectiveness of CA versus CSR communication strategy by industry type

Given the importance of communication in the realm of corporate associations, this study analyzes the roles that communication strategies play in the formation of corporate associations. The study examines (1) whether particular types of associations (corporate ability or corporate social responsibility associations) can be developed through CA- or CSR-based communication strategies, and (2) the relative effectiveness of these two association types at amplifying favorable consumer responses across three different industries (consumable goods, durable goods, and stigmatized goods). An experiment was conducted to test the proposed model with six Fortune 500 companies. The results demonstrate that communication strategies can effectively facilitate a particular type of association. Differing levels of association effectiveness were found within each industry. For the consumable goods industry, CA associations are found to be more effective than CSR associations. For the durable goods industry, CSR associations are more influential at enhancing consumer attitudes and purchase intent than CA associations, while CA associations have a larger impact on supportive communication intent. In the case of the stigmatized industry, CSR associations play a determinant role in fostering positive consumer responses. This study provides managers and communication specialists with more concrete guidance for choosing a particular corporate positioning and communication strategy.     

Native language,spoken language,translation and trade

We construct new series for common native language and common spoken language for 195 countries, which we use together with series for common official language and linguistic proximity in order to draw inferences about (1) the aggregate impact of all linguistic factors on bilateral trade, (2) the separate role of ease of communication as distinct from ethnicity and trust, and (3) the contribution of translation and interpreters to ease of communication. The results show that the impact of linguistic factors, all together, is at least twice as great as the usual dummy variable for common language, resting on official language, would say. In addition, ease of communication plays a distinct role, apart from ethnicity and trust, and so far as ease of communication enters, translation and interpreters are significant. Finally, emigrants have much to do with the role of ethnicity and trust in linguistic influence.