Process gain (original) (raw)

About DBpedia

流程增益(Process gain)(或處理增益)是在一個擴頻系統中傳播頻寛和未傳播頻寛之比。通常以分貝(dB)表示。 例如,如果一個 1 kHz 的信號被擴展到 100 kHz,流程增益以數值比表示為100000/1000 = 100。或者以分貝表示,10log10(100) = 20 dB. 請注意,流程增益不降低頻寛熱噪聲的影響。 可以證明出當非展頻系統具有相同的調製格式,一個直接序列展頻(DSSS)系統具有完全相同的比特錯誤行為。因此,在加性高斯白噪聲(AWGN)的頻道無受到干擾,展頻系統要求使用相同的發射器功率作為非展頻系統,所有其他的東西都是平等的。 不同於傳統的通信系統,然而,一個直接序列擴頻(DSSS)系統確實具有一定的阻力抵抗窄帶的干擾,干擾並不受到直接序列擴頻(DSSS)信號的流程增益,因此,信號與干擾的比值變高了。 在調頻(FM),流程增益可以表示為: Gp 是處理增益 Bn 是雜訊頻寬 Δf 是峰值頻率的差值 W 是正弦調製頻率

thumbnail

Property Value
dbo:abstract In a spread-spectrum system, the process gain (or "processing gain") is the ratio of the spread (or RF) bandwidth to the unspread (or baseband) bandwidth. It is usually expressed in decibels (dB). For example, if a 1 kHz signal is spread to 100 kHz, the process gain expressed as a numerical ratio would be 100000/1000 = 100. Or in decibels, 10 log10(100) = 20 dB. Note that process gain does not reduce the effects of wideband thermal noise. It can be shown that a direct-sequence spread-spectrum (DSSS) system has exactly the same bit error behavior as a non-spread-spectrum system with the same modulation format. Thus, on an additive white Gaussian noise (AWGN) channel without interference, a spread system requires the same transmitter power as an unspread system, all other things being equal. Unlike a conventional communication system, however, a DSSS system does have a certain resistance against narrowband interference, as the interference is not subject to the process gain of the DSSS signal, and hence the signal-to-interference ratio is improved. In frequency modulation (FM), the processing gain can be expressed as where: Gp is the processing gain,Bn is the noise bandwidth,Δf is the peak frequency deviation,W is the sinusoidal modulating frequency. * v * t * e (en) 流程增益(Process gain)(或處理增益)是在一個擴頻系統中傳播頻寛和未傳播頻寛之比。通常以分貝(dB)表示。 例如,如果一個 1 kHz 的信號被擴展到 100 kHz,流程增益以數值比表示為100000/1000 = 100。或者以分貝表示,10log10(100) = 20 dB. 請注意,流程增益不降低頻寛熱噪聲的影響。 可以證明出當非展頻系統具有相同的調製格式,一個直接序列展頻(DSSS)系統具有完全相同的比特錯誤行為。因此,在加性高斯白噪聲(AWGN)的頻道無受到干擾,展頻系統要求使用相同的發射器功率作為非展頻系統,所有其他的東西都是平等的。 不同於傳統的通信系統,然而,一個直接序列擴頻(DSSS)系統確實具有一定的阻力抵抗窄帶的干擾,干擾並不受到直接序列擴頻(DSSS)信號的流程增益,因此,信號與干擾的比值變高了。 在調頻(FM),流程增益可以表示為: Gp 是處理增益 Bn 是雜訊頻寬 Δf 是峰值頻率的差值 W 是正弦調製頻率 (zh)
dbo:thumbnail wiki-commons:Special:FilePath/Processinggain.jpg?width=300
dbo:wikiPageID 202094 (xsd:integer)
dbo:wikiPageLength 1732 (xsd:nonNegativeInteger)
dbo:wikiPageRevisionID 774373286 (xsd:integer)
dbo:wikiPageWikiLink dbr:Noise_(telecommunications) dbr:Decibel dbr:Additive_white_Gaussian_noise dbc:Signal_processing dbr:DSSS dbr:Frequency_modulation dbr:Spread-spectrum dbr:File:Processinggain.jpg
dbp:wikiPageUsesTemplate dbt:Telecomm-stub dbt:Unreferenced dbt:Val dbt:Cdma
dct:subject dbc:Signal_processing
rdfs:comment 流程增益(Process gain)(或處理增益)是在一個擴頻系統中傳播頻寛和未傳播頻寛之比。通常以分貝(dB)表示。 例如,如果一個 1 kHz 的信號被擴展到 100 kHz,流程增益以數值比表示為100000/1000 = 100。或者以分貝表示,10log10(100) = 20 dB. 請注意,流程增益不降低頻寛熱噪聲的影響。 可以證明出當非展頻系統具有相同的調製格式,一個直接序列展頻(DSSS)系統具有完全相同的比特錯誤行為。因此,在加性高斯白噪聲(AWGN)的頻道無受到干擾,展頻系統要求使用相同的發射器功率作為非展頻系統,所有其他的東西都是平等的。 不同於傳統的通信系統,然而,一個直接序列擴頻(DSSS)系統確實具有一定的阻力抵抗窄帶的干擾,干擾並不受到直接序列擴頻(DSSS)信號的流程增益,因此,信號與干擾的比值變高了。 在調頻(FM),流程增益可以表示為: Gp 是處理增益 Bn 是雜訊頻寬 Δf 是峰值頻率的差值 W 是正弦調製頻率 (zh) In a spread-spectrum system, the process gain (or "processing gain") is the ratio of the spread (or RF) bandwidth to the unspread (or baseband) bandwidth. It is usually expressed in decibels (dB). For example, if a 1 kHz signal is spread to 100 kHz, the process gain expressed as a numerical ratio would be 100000/1000 = 100. Or in decibels, 10 log10(100) = 20 dB. In frequency modulation (FM), the processing gain can be expressed as where: Gp is the processing gain,Bn is the noise bandwidth,Δf is the peak frequency deviation,W is the sinusoidal modulating frequency. * v * t * e (en)
rdfs:label Process gain (en) 流程增益 (zh)
owl:sameAs freebase:Process gain wikidata:Process gain dbpedia-zh:Process gain https://global.dbpedia.org/id/3nBvQ
prov:wasDerivedFrom wikipedia-en:Process_gain?oldid=774373286&ns=0
foaf:depiction wiki-commons:Special:FilePath/Processinggain.jpg
foaf:isPrimaryTopicOf wikipedia-en:Process_gain
is dbo:wikiPageRedirects of dbr:SNR_process_gain dbr:Signal_processing_gain dbr:Processing_gain
is dbo:wikiPageWikiLink of dbr:SNR_process_gain dbr:WWVB dbr:Gain_(electronics) dbr:Signal_processing_gain dbr:Processing_gain
is foaf:primaryTopic of wikipedia-en:Process_gain