SBIR Phase I: Development of Applique Propagation Measurement Circuits for Enhanced Non-Line-of-Sight Broadband Wireless

这个小型企业创新研究(SBIR)第一阶段项目建议开发嵌入式传播测量电路，该电路将与宽带无线网络结合使用。它基于这样的原则，即最好提前了解非视距传输信道的信号强度、路径失真等，而不是将查询置于数据分组中。当前的系统通过冗余传输、重复请求、过大的发射功率或通过对可用操作范围施加限制来过度补偿这种预知的缺乏。研究将强调行业研究和分析的性能，以优化算法，使其在可能的最高水平的信道压力下工作，包括但不限于最低的信噪比、最高的多普勒率、最差的多径、最长的距离和最高数量的冗余天线。无线非视距技术，如多输入多输出(MIMO)、智能天线、Turbo编码和分集组合，将使设备供应商受益，因为他们现在将能够重复使用大多数内部调制解调器设计，并仍然利用该产品的应用性质。这项技术将惠及以下用户群体：1)农村社区；2)消防救援、警察、救护服务和机场安检等第一反应群体；3)在需要移动、户外工作的群体中工作；4)远距离密切合作通信，如农业、海事贸易、林业、石油钻探、公用事业作业、建筑和军事人员。

This Small Business Innovation Research (SBIR) Phase I project proposes to lead to development of embedded propagation measurement circuits that will be used as an applique in conjunction with broadband wireless networks. It is predicated on the principle that it is better to learn about signal strength, path distortion, etc., of non-line-of-sight transmission channels ahead of time rather than placing queries into data packets. Current systems over-compensates for this lack of foreknowledge through redundant transmissions, repeat requests, oversizing transmit power, or by placing limitations on useful range of operations. Research will emphasize performance of trade studies and analyses to optimize algorithms so that they work to the highest possible levels of channel stress including, but not limited to lowest signal-to-noise ratio, highest rates of Doppler, worst multipath, longest range, and highest number of redundancy antennas. Wireless non-line-of-sight techniques such as multiple input multiple output (MIMO), smart antennas, turbo coding, and diversity combining, will benefit equipment suppliers because now they will be able to reuse most of their internal modem designs and still take advantage of the applique nature of this product. This technology will benefit the following groups of users: 1) rural communities, 2) first response groups such as Fire and Rescue, Police, Ambulance services, and Airport Security, 3) people working in groups that require mobility, outdoor work, and 4) close cooperative communications over large distances such as Agriculture, Maritime Trades, Forestry, Oil Drilling, Utilities Operations, Construction and Military personnel.