In response to a request from the Defense Advanced Research Projects Agency, the committee studied a range of issues to help identify what strategies the Department of Defense might follow to meet its need for flexible, rapidly deployable communications systems. Taking into account the military's particular requirements for security, interoperability, and other capabilities as well as the extent to which commercial technology development can be expected to support these and related needs, the book recommends systems and component research as well as organizational changes to help the DOD field state-of-the-art, cost-effective untethered communications systems. In addition to advising DARPA on where its investment in information technology for mobile wireless communications systems can have the greatest impact, the book explores the evolution of wireless technology, the often fruitful synergy between commercial and military research and development efforts, and the technical challenges still to be overcome in making the dream of "anytime, anywhere" communications a reality.

Every day in cities and towns across the Nation, emergency response personnel respond to incidents of varying scope and magnitude. Their ability to communicate in real time is critical to establishing command and control at the scene of an emergency, to maintaining event situational awareness, and to operating overall within a broad range of incidents. However, as numerous after-action reports and national assessments have revealed, there are still communications deficiencies that affect the ability of responders to manage routine incidents and support responses to natural disasters, acts of terrorism, and other incidents. Recognizing the need for an overarching emergency communications strategy to address these shortfalls, Congress directed the Department of Homeland Security's (DHS) Office of Emergency Communications (OEC) to develop the first National Emergency Communications Plan (NECP). Title XVIII of the Homeland Security Act of 2002 (6 United States Code 101 et seq.), as amended, calls for the NECP to be developed in coordination with stakeholders from all levels of government and from the private sector. In response, DHS worked with stakeholders from Federal, State, local, and tribal agencies to develop the NECP—a strategic plan that establishes a national vision for the future state of emergency communications. To realize this national vision and meet these goals, the NECP established the following seven objectives for improving emergency communications for the Nation's Federal, State, local, and tribal emergency responders: 1. Formal decision-making structures and clearly defined leadership roles coordinate emergency communications capabilities. 2. Federal emergency communications programs and initiatives are collaborative across agencies and aligned to achieve national goals. 3. Emergency responders employ common planning and operational protocols to effectively use their resources and personnel. 4. Emerging technologies are integrated with current emergency communications capabilities through standards implementation, research and development, and testing and evaluation. 5. Emergency responders have shared approaches to training and exercises, improved technical expertise, and enhanced response capabilities. 6. All levels of government drive long-term advancements in emergency communications through integrated strategic planning procedures, appropriate resource allocations, and public-private partnerships. 7. The Nation has integrated preparedness, mitigation, response, and recovery capabilities to communicate during significant events. The NECP also provides recommended initiatives and milestones to guide emergency response providers and relevant government officials in making measurable improvements in emergency communications capabilities. The NECP recommendations help to guide, but do not dictate, the distribution of homeland security funds to improve emergency communications at the Federal, State, and local levels, and to support the NECP implementation. Communications investments are among the most significant, substantial, and long-lasting capital investments that agencies make; in addition, technological innovations for emergency communications are constantly evolving at a rapid pace. With these realities in mind, DHS recognizes that the emergency response community will realize this national vision in stages, as agencies invest in new communications systems and as new technologies emerge.

A comprehensive introduction to the fundamentals of design and applications of wireless communications Wireless Communications Systems starts by explaining the fundamentals needed to understand, design, and deploy wireless communications systems. The author, a noted expert on the topic, explores the basic concepts of signals, modulation, antennas, and propagation with a MATLAB emphasis. The book emphasizes practical applications and concepts needed by wireless engineers. The author introduces applications of wireless communications and includes information on satellite communications, radio frequency identification, and offers an overview with practical insights into the topic of multiple input multiple output (MIMO). The book also explains the security and health effects of wireless systems concerns on users and designers. Designed as a practical resource, the text contains a range of examples and pictures that illustrate many different aspects of wireless technology. The book relies on MATLAB for most of the computations and graphics. This important text: Reviews the basic information needed to understand and design wireless communications systems Covers topics such as MIMO systems, adaptive antennas, direction finding, wireless security, internet of things (IoT), radio frequency identification (RFID), and software defined radio (SDR) Provides examples with a MATLAB emphasis to aid comprehension Includes an online solutions manual and video lectures on selected topics Written for students of engineering and physics and practicing engineers and scientists, Wireless Communications Systems covers the fundamentals of wireless engineering in a clear and concise manner and contains many illustrative examples.

Includes embassy and diplomatic radio systems, military radio communications, and drug and immigrant smuggling networks.

A masterful history of a long underappreciated institution, How the Post Office Created America examines the surprising role of the postal service in our nation’s political, social, economic, and physical development. The founders established the post office before they had even signed the Declaration of Independence, and for a very long time, it was the U.S. government’s largest and most important endeavor—indeed, it was the government for most citizens. This was no conventional mail network but the central nervous system of the new body politic, designed to bind thirteen quarrelsome colonies into the United States by delivering news about public affairs to every citizen—a radical idea that appalled Europe’s great powers. America’s uniquely democratic post powerfully shaped its lively, argumentative culture of uncensored ideas and opinions and made it the world’s information and communications superpower with astonishing speed. Winifred Gallagher presents the history of the post office as America’s own story, told from a fresh perspective over more than two centuries. The mandate to deliver the mail—then “the media”—imposed the federal footprint on vast, often contested parts of the continent and transformed a wilderness into a social landscape of post roads and villages centered on post offices. The post was the catalyst of the nation’s transportation grid, from the stagecoach lines to the airlines, and the lifeline of the great migration from the Atlantic to the Pacific. It enabled America to shift from an agrarian to an industrial economy and to develop the publishing industry, the consumer culture, and the political party system. Still one of the country’s two major civilian employers, the post was the first to hire women, African Americans, and other minorities for positions in public life. Starved by two world wars and the Great Depression, confronted with the country’s increasingly anti-institutional mind-set, and struggling with its doubled mail volume, the post stumbled badly in the turbulent 1960s. Distracted by the ensuing modernization of its traditional services, however, it failed to transition from paper mail to email, which prescient observers saw as its logical next step. Now the post office is at a crossroads. Before deciding its future, Americans should understand what this grand yet overlooked institution has accomplished since 1775 and consider what it should and could contribute in the twenty-first century. Gallagher argues that now, more than ever before, the imperiled post office deserves this effort, because just as the founders anticipated, it created forward-looking, communication-oriented, idea-driven America.