IV - Extra¶

1. CubeSat performances¶

1.1 Measurement of encoding/decoding time.¶

POSIX requires that CLOCKS_PER_SEC equals 1000000 independent of the actual resolution.

1000 ticks per milliseconds

Time measurement of data encoding

Printing clock data

Chart of Reed Solomon time measurement

Floating-Point OPeration (FLOP)

Hence, encoding stands for O(nbytes x NPAR) with nbytes is the codeword length, NPAR the number of parity bits.
Since it is a systematic code nbytes = information_word_length + NPAR encoding stands for O(information_word_length) with NPAR constant.

1.2 Busy memory on CubeSat.¶

Research papers proposed on IEEE Website :
- Transport layer coding for the land mobile satellite channel
- Erasure Codes for Space Communications: Recent Findings and New Challenges