Orthogonal frequency-division multiplexing (redirect from COFDM)
single-carrier system. In coded orthogonal frequency-division multiplexing (COFDM), forward error correction (convolutional coding) and time/frequency interleaving...
88 KB (11,256 words) - 17:25, 4 September 2024
8VSB (section 8VSB vs COFDM)
is used primarily in North America; in contrast, the DVB-T standard uses COFDM. A modulation method specifies how the radio signal fluctuates to convey...
14 KB (1,698 words) - 21:39, 25 April 2024
Single-frequency network (section OFDM and COFDM)
broadcasting, self-interference cancellation is facilitated by the OFDM or COFDM modulation method. OFDM uses a large number of slow low-bandwidth modulators...
10 KB (1,348 words) - 18:53, 11 June 2024
designator for COFDM is W7D. The W7D comes from Paragraph 40 of the November 13, 2002, ET Docket 01-75 R&O. It is only coincidence that the QAM and COFDM emission...
12 KB (1,024 words) - 18:40, 22 August 2024
transport stream, using coded orthogonal frequency-division multiplexing (COFDM or OFDM) modulation. It is also the format widely used worldwide (including...
37 KB (3,889 words) - 12:19, 7 October 2024
spectral masks for the same purpose. Many digital modulation methods such as COFDM use the electromagnetic spectrum very efficiently, allowing for a very tight...
3 KB (338 words) - 13:25, 7 February 2024
and TiMi 3. DVB-T uses coded orthogonal frequency division multiplexing (COFDM), which uses as many as 8000 independent carriers, each transmitting data...
47 KB (5,115 words) - 23:09, 6 October 2024
Radio modulation AM FM COFDM Frequency allocations LW (LF) MW (MF) SW (HF) VHF (low / mid / high) L band (UHF) Digital systems CAM-D DAB/DAB+ DRM/DRM+...
35 KB (3,929 words) - 18:46, 1 October 2024
Philips since 1989. This codec incorporated into a broadcasting system using COFDM modulation was demonstrated on air and in the field with Radio Canada and...
108 KB (11,590 words) - 04:53, 1 October 2024
included QAM, Spectrally-Shaped QAM, 6 VSB (with trellis code) and 4/2 VSB. COFDM had been proposed by third parties, but was rejected as not being mature...
7 KB (776 words) - 19:38, 23 December 2023
television may corrupt the signal beyond use for digital television. 8VSB, COFDM, and other modulation schemes seek to correct this. Ghost-canceling reference...
5 KB (438 words) - 23:11, 13 September 2024
neighbours: it is not confined to a 4.3125 kHz wide channel. The orthogonality of COFDM makes this possible without interference. Up to 15 bits per symbol can be...
16 KB (3,004 words) - 01:30, 19 August 2023
modulation used for DRM is coded orthogonal frequency division multiplexing (COFDM), where every carrier is modulated with quadrature amplitude modulation...
25 KB (2,995 words) - 05:57, 8 October 2024
listed use ATSC, which has a single VSB carrier wave. Other countries use COFDM modulation for DVB-T (Taiwan, Colombia, Panama) or ISDB-Tb (Philippines...
51 KB (2,008 words) - 01:09, 4 October 2024
is still a robust signal under various conditions. 8VSB was chosen over COFDM in part because many areas are rural and have a much lower population density...
47 KB (4,896 words) - 08:01, 23 September 2024
original on 2016-03-22. Retrieved 2014-12-11. "Transitioning transmitters to COFDM". Archived from the original on 2009-08-21. Retrieved 2009-06-17. R. Wolf;...
14 KB (1,255 words) - 15:26, 12 February 2024
with COFDM. Television newsgathering links from mobile vans to central receive points (often on mountaintops or tall buildings) use DVB-T with COFDM in...
35 KB (4,036 words) - 16:32, 13 October 2024
registration is required to download PDF) Stott, J. H.; The How and Why of COFDM, BBC Research Development WorldDAB, the global industry forum for digital...
92 KB (9,881 words) - 12:17, 12 October 2024
Integrated Coding And Multiplexing), Transmission Coding & Multiplexing and COFDM Modulation. MUSICAM was one of the few codecs able to achieve high audio...
29 KB (3,421 words) - 12:41, 20 May 2024
technology was known as DirectBand. FMeXtra on FM uses dozens of small COFDM subcarriers to transmit digital radio in a fully in-band on-channel manner...
10 KB (1,350 words) - 17:16, 17 July 2024
Radio modulation AM FM COFDM Frequency allocations LW (LF) MW (MF) SW (HF) VHF (low / mid / high) L band (UHF) Digital systems CAM-D DAB/DAB+ DRM/DRM+...
26 KB (2,720 words) - 10:18, 11 October 2024
purchase a new DRM receiver. The modulation used is a form of OFDM called COFDM in which, up to 4 carriers are transmitted on a channel formerly occupied...
160 KB (16,035 words) - 17:06, 6 October 2024
spectrum. The idea of LTE was first proposed in 1998, with the use of the COFDM radio access technique to replace the CDMA and studying its Terrestrial...
77 KB (7,663 words) - 11:43, 11 October 2024
Radio modulation AM FM COFDM Frequency allocations LW (LF) MW (MF) SW (HF) VHF (low / mid / high) L band (UHF) Digital systems CAM-D DAB/DAB+ DRM/DRM+...
3 KB (349 words) - 14:33, 22 August 2024
modulation methods: for instance, the DREAM open-source project decodes the COFDM technique used by Digital Radio Mondiale. There is a broad range of hardware...
30 KB (3,928 words) - 05:02, 31 July 2024
digital sound broadcasting uses CDM, and ISDB-T (in VHF and/or UHF band) uses COFDM with PSK/QAM. Besides audio and video transmission, ISDB also defines data...
58 KB (5,706 words) - 17:28, 10 September 2024
United States).[citation needed] The modulation method used in DVB-T is COFDM, with either 64 or 16-state Quadrature Amplitude Modulation (QAM). In general...
207 KB (18,958 words) - 23:05, 17 September 2024
correction and do a FFT to convert the data packets into COFDM signals, and Send the COFDM signals out the TV antenna. A pipelined multi-threading parallelizing...
14 KB (1,589 words) - 20:00, 23 October 2023
30 MHz. The two standards also share the same basic modulation scheme (COFDM), and HD AM uses a proprietary codec. DRM 30 operates with xHE-AAC, historically...
79 KB (9,284 words) - 11:02, 12 October 2024