Bounds on the Information Carrying Capacity of Pn Waves

Harris, D B

关键词: CAPACITY;    MIRRORS;    RESOLUTION;    SCATTERING;    TELEPHONES;   

DOI  :  10.2172/945560
RP-ID  :  LLNL-TR-409237
PID  :  OSTI ID: 945560
Others  :  TRN: US200904%%86

学科分类：地球科学(综合)

美国|英语

来源: SciTech Connect

【 摘 要 】

Upper and lower bounds on the capacity of the Pn wave to transmit information about source identity are developed using models and measurements of Pn spatial signal structure across the ARCES array. The results show a very significant increase in information carrying capacity when contrasting observed propagation conditions with idealized free-space propagation. In essence, scattering greatly increases Pn channel capacity. As shown in a previous contribution, this increase in information can be captured with matched field calibrations and exploited to resolve sources more closely spaced than the Rayleigh resolution limit. These results mirror practices in cellular telephones that use arrays at the transmitter and receiver to exploit scattering for increased channel capacity.