The choice of modulation schemes is a fundamental building block wireless communication systems. As key component physical layer design, they critically impact the expected capacity and signal robustness. Their design also critical for successful roll-out standards that require compromise between performance, efficiency, latency, hardware requirements. This paper presents survey constellation s...

The 2006 American Community Survey (ACS) Content Test is a large household sample survey (over 60,000) designed to test proposed changes to the ACS questionnaire for 2008. The original base sample design is a stratified primary sample unit design that builds on the sample design of an earlier survey, the Census 2000 Supplementary Survey. In response to changing field requirements, several chang...