Bandwidth‐Efficient Digital Modulation with Application to Deep Space Communications

Multiple-bit differential detection of offset qpsk

“…The same limiting behavior has also been demonstrated for spectrally shaped OQPSK with linear phase variation. Extension of the method to differential detection of more bandwidth-efficient forms of SOQPSK [22] with precoded partial response CPM representations [17] is possible but somewhat more complex because of the increase in the number of trellis states.…”

Дослідження Технічної Ефективності Телекомунікаційних Систем Та Мереж При Використанні Різних Методів Передавання Даних Із Керуючим Зворотним Зв’язком

“…Дослідженню ефективності телекомунікаційних систем та мереж присвячено значну кількість публікацій [3][4][5][6][7][8]. Проте актуальною задачею залишається виявлення шляхів підвищення технічної ефективності таких систем та мереж.…”

Continuous Phase Modulation of F-QPSK-B Signals

“…The third T b interval of g 0 (t) can be derived similarly. Using (9) and (15), the premodulation filter for the CPM of F-QPSK-E 2 g 0 (t) is written as (16), shown at the bottom of page.…”

“…There has also been an increasing need for both power and spectrum efficient modulation techniques for telemetry systems. Multiyear studies by the U.S. Department of Defense, NASA, AIAA, and the International Consultative Committee for Space Data Systems (CCSDS) have confirmed that Feherpatented quadrature phase-shift keying (F-QPSK) technologies [10]- [16] offer the most spectrally efficient and robust (smallest degradation from ideal theory) bit-error-rate (BER) performance of nonlinear amplification (NLA, saturation mode operation of high-power amplifier)-RF power efficient systems. Based on numerous F-QPSK airplane-to-ground, ground-toground, and satellite tests in the 1 to 600 Mb/s range, F-QPSK has been specified in the new telemetry standard known as IRIG 106-00 [17] and has been recommended by the CCSDS for use in high-speed space communication systems.…”