子帶編碼 sub-band coding (SBC)
子基地臺 subbase station
子序列越區(qū)規(guī)程 subsequent handover procedure
子幀 subframe
自測試 self-test
自動(dòng)（動(dòng)態(tài)）壓縮 automatic (dynamic) compression
自動(dòng)撥號設(shè)備 automatic dialing unit (ADU)
自動(dòng)測試 automatic test
自動(dòng)車輛定位系統(tǒng) automatic vehicle location system
自動(dòng)電話 automatic telephone system
自動(dòng)電話機(jī) automatic telephone set
自動(dòng)發(fā)射機(jī)識別 automatic transmitter identification
自動(dòng)呼叫 automatic calling
自動(dòng)呼叫識別 automatic call identification
自動(dòng)化 automation
自動(dòng)交換設(shè)備 automatic switching equipment
自動(dòng)接入多信道無繩電話 autoaccess multiple channel cordless telephone
自動(dòng)頻率公用 automatic frequency sharing
自動(dòng)頻率控制 automatic frequency control (AFC)
自動(dòng)頻率微調(diào) automatic frequency fine control (AFEC)
自動(dòng)頻率微調(diào)捕捉范圍 automatic frequency fine control pull-in range
自動(dòng)頻率微調(diào)捕捉時(shí)間 automatic frequency fine control pull-in time
自動(dòng)頻率微調(diào)剩余誤差 automatic frequency fine control residential error
自動(dòng)頻率微調(diào)同步范圍 automatic frequency fine control locking-in range
自動(dòng)頻率微調(diào)最大跟蹤速率
automatic frequency fine control maximum tracking rate
自動(dòng)請求重發(fā) automatic repeat request (ARQ)
自動(dòng)信道選擇 automatic channel selection
自動(dòng)尋呼系統(tǒng) automatic paging system
自動(dòng)功率控制 automatic power control (APC)
自動(dòng)增益控制 automatic gain control (AGC)
自動(dòng)增益控制特性 automatic gain-control (AGC) characteristic
自放電 self-discharge
自激蕩器 self-excited oscillation
自舉電路 bootstrap circuit
自然輻射源 natural radiator
自然干擾 natural interference
自然空間輻射 natural space radiation
自然冷卻 natural cooling
自然躁聲 natural noise
自適應(yīng) adaptation
自適應(yīng)差分脈沖編碼調(diào)制 adaptive differential pulse code modulation (ADPCM)
自適應(yīng)接收機(jī) adaptive receiver
自適應(yīng)均衡 adaptive equalization
自適應(yīng)控制系統(tǒng) adaptive control system
自適應(yīng)天線 adaptive antenna
自適應(yīng)通信 adaptive communication
自適應(yīng)短波電臺 adaptive HF station
自適應(yīng)預(yù)測 adaptive prediction
自適應(yīng)預(yù)測編碼 adaptive prediction coding
自適應(yīng)增量調(diào)制 adaptive delta modulation (ADM)
自學(xué)習(xí)系統(tǒng) self-learning system
自由空間 free space
自由空間傳播 free space propagation
自由空間光通信 free space optical communication
自由空間基本傳輸損耗 free space basic transmission loss
自組織無線電通信網(wǎng) self-organization radio communication network
字長 word length
字段 field
字符 character
字符長度 character size
字符串 character string
字符差錯(cuò)率 character error rate
字符速率 character rate
字符信號 character signal
字節(jié) octet
字塊 block
綜合辦公室自動(dòng)化系統(tǒng) integrated automated office system
綜合測試儀 general-purpose tester
綜合環(huán)境實(shí)驗(yàn) combined environment test
綜合數(shù)字網(wǎng) integrated digital network
綜合相位控制 generated phase control
綜合業(yè)務(wù)數(shù)字網(wǎng) ISDN, integrated services digital network
綜合業(yè)務(wù)網(wǎng) integrated services network (ISN)
總失真系數(shù) total distortion factor
總損耗（無線線路的） total loss (of a radio link)
阻斷/解阻 blocking /deblocking
阻塞 blocking
阻塞（四分之一波長）濾波器 stop (quarter-wave) filter
組合干擾 combination interference
組合音 combination tone
組呼 talkgroup call
阻尼振蕩 damped oscillation
組裝效率 packaging efficiency
最大副/主瓣比 maximum relative side lobe level
最大可用幅偏 maximum usable amplitude deviation
最大似然譯碼 maximum likelihood decoding
最大調(diào)整率（最大塞入率） maximum justification rate (maximum stuffing rate)
最大有用功率 maximum useful power
最大允許頻（相）偏 maximum permissible frequency (phase) deviation
最低可用頻率 lowest usable frequency
最低位 least-significant bit (LSB)
最高可用頻率 maximum usable frequency (LUF)
最高振蕩頻率 maximum frequency of oscillation
最小可用場強(qiáng)，最小可用功率通量密度minimum usable field-strength (Emin), minimum usable power flux density (Pmin)
最小碼距 minimum distance
最小頻移鍵控 minimum shift keying (MSK)
最終檢驗(yàn) final inspection
最佳工作頻率 optimum working frequency (OWF)
左旋極化波（或逆時(shí)針極化波）left-hand (or anti-clockwise)-polarized wave