1. Analysis of concatenated waveforms and required STC
- Author
-
Jian Wang, Eli Brookner, and Mark Gerecke
- Subjects
Engineering ,RF front end ,business.industry ,Concatenated error correction code ,Electrical engineering ,Data_CODINGANDINFORMATIONTHEORY ,law.invention ,Sensitivity time control ,Pulse compression ,law ,Electronic engineering ,Clutter ,Radio frequency ,Radar ,business ,Secondary surveillance radar - Abstract
In modern surveillance radar, pulse compression is applied to achieve long range coverage while maintaining both low transmit peak power and desired range resolution. When there is a requirement to increase the radarpsilas range without a corresponding increase in the transmitted peak power it is required that a longer uncompressed pulse be used. As a consequence the blind range, associated with blanking the receiver whilst transmitting the pulse, will increase and short range coverage will be lost. In this paper we initially present a system of concatenated waveforms that provide simultaneous radar coverage for both near and far ranges. The solution incorporates a combination of longer sub-pulses for far range and shorter sub-pulses for near range. Although the concatenated waveforms have a number of attractive attributes, they present a challenging problem in that different sub-pulses will reflect back from different ranges and be received at the same time. Therefore since each sub-pulse is not separable at the RF front end a more complex sensitivity time control (STC) is required. In the second part of this paper we analyze this phenomenon and propose a STC scheme to address the issue.
- Published
- 2008